395247343969 has 3 divisors (see below), whose sum is σ = 395247972657. Its totient is φ = 395246715282.

The previous prime is 395247343943. The next prime is 395247343987. The reversal of 395247343969 is 969343742593.

The square root of 395247343969 is 628687.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 395247343969 - 2¹⁷ = 395247212897 is a prime.

It is a super-2 number, since 2×395247343969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 395247343969.

It is not an unprimeable number, because it can be changed into a prime (395247343919) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 314344 + ... + 943030.

It is an arithmetic number, because the mean of its divisors is an integer number (131749324219).

Almost surely, 2^395247343969 is an apocalyptic number.

395247343969 is the 628687-th square number.

395247343969 is the 314344-th centered octagonal number.

It is an amenable number.

395247343969 is a deficient number, since it is larger than the sum of its proper divisors (628688).

395247343969 is an frugal number, since it uses more digits than its factorization.

395247343969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257374 (or 628687 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 64.

Multiplying 395247343969 by its sum of digits (64), we get a square (25295830014016 = 5029496²).

The spelling of 395247343969 in words is "three hundred ninety-five billion, two hundred forty-seven million, three hundred forty-three thousand, nine hundred sixty-nine".