345699649 has 3 divisors (see below), whose sum is σ = 345718243. Its totient is φ = 345681056.

The previous prime is 345699647. The next prime is 345699689. The reversal of 345699649 is 946996543.

The square root of 345699649 is 18593.

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 can be written as a sum of positive squares in only one way, i.e., 200930625 + 144769024 = 14175^2 + 12032^2 .

It is not a de Polignac number, because 345699649 - 2¹ = 345699647 is a prime.

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 345699649.

It is not an unprimeable number, because it can be changed into a prime (345699643) 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, 9297 + ... + 27889.

Almost surely, 2^345699649 is an apocalyptic number.

345699649 is the 18593-rd square number.

345699649 is the 9297-th centered octagonal number.

It is an amenable number.

345699649 is a deficient number, since it is larger than the sum of its proper divisors (18594).

345699649 is an frugal number, since it uses more digits than its factorization.

345699649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37186 (or 18593 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 55.

The cubic root of 345699649 is about 701.8316987089.

The spelling of 345699649 in words is "three hundred forty-five million, six hundred ninety-nine thousand, six hundred forty-nine".