387577969 has 3 divisors (see below), whose sum is σ = 387597657. Its totient is φ = 387558282.

The previous prime is 387577943. The next prime is 387577973. The reversal of 387577969 is 969775783.

The square root of 387577969 is 19687.

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 387577969 - 2⁵ = 387577937 is a prime.

It is a super-2 number, since 2×387577969² = 300433364108329922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387577919) 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, 9844 + ... + 29530.

It is an arithmetic number, because the mean of its divisors is an integer number (129199219).

Almost surely, 2^387577969 is an apocalyptic number.

387577969 is the 19687-th square number.

387577969 is the 9844-th centered octagonal number.

It is an amenable number.

387577969 is a deficient number, since it is larger than the sum of its proper divisors (19688).

387577969 is an frugal number, since it uses more digits than its factorization.

387577969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39374 (or 19687 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 61.

The cubic root of 387577969 is about 729.0987620872.

The spelling of 387577969 in words is "three hundred eighty-seven million, five hundred seventy-seven thousand, nine hundred sixty-nine".