368939809 has 4 divisors (see below), whose sum is σ = 421645504. Its totient is φ = 316234116.

The previous prime is 368939789. The next prime is 368939833. The reversal of 368939809 is 908939863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-368939809 is a prime.

It is a super-2 number, since 2×368939809² = 272233165329912962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 368939809.

It is not an unprimeable number, because it can be changed into a prime (368939869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26352837 + ... + 26352850.

It is an arithmetic number, because the mean of its divisors is an integer number (105411376).

Almost surely, 2^368939809 is an apocalyptic number.

It is an amenable number.

368939809 is a deficient number, since it is larger than the sum of its proper divisors (52705695).

368939809 is an equidigital number, since it uses as much as digits as its factorization.

368939809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52705694.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 368939809 is about 19207.8059392529. The cubic root of 368939809 is about 717.2190883564.

The spelling of 368939809 in words is "three hundred sixty-eight million, nine hundred thirty-nine thousand, eight hundred nine".