390899307 has 4 divisors (see below), whose sum is σ = 521199080. Its totient is φ = 260599536.

The previous prime is 390899291. The next prime is 390899363. The reversal of 390899307 is 703998093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 703998093 = 3 ⋅234666031.

It is not a de Polignac number, because 390899307 - 2⁴ = 390899291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390899387) 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, 65149882 + ... + 65149887.

It is an arithmetic number, because the mean of its divisors is an integer number (130299770).

Almost surely, 2^390899307 is an apocalyptic number.

390899307 is a deficient number, since it is larger than the sum of its proper divisors (130299773).

390899307 is a wasteful number, since it uses less digits than its factorization.

390899307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130299772.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 390899307 is about 19771.1736373944. The cubic root of 390899307 is about 731.1755046034.

The spelling of 390899307 in words is "three hundred ninety million, eight hundred ninety-nine thousand, three hundred seven".