399296189 has 4 divisors (see below), whose sum is σ = 401188800. Its totient is φ = 397403580.

The previous prime is 399296159. The next prime is 399296197. The reversal of 399296189 is 981692993.

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 not a de Polignac number, because 399296189 - 2²⁴ = 382518973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399296159) 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, 945989 + ... + 946410.

It is an arithmetic number, because the mean of its divisors is an integer number (100297200).

Almost surely, 2^399296189 is an apocalyptic number.

It is an amenable number.

399296189 is a deficient number, since it is larger than the sum of its proper divisors (1892611).

399296189 is a wasteful number, since it uses less digits than its factorization.

399296189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892610.

The product of its digits is 1889568, while the sum is 56.

The square root of 399296189 is about 19982.3969783407. The cubic root of 399296189 is about 736.3739023750.

The spelling of 399296189 in words is "three hundred ninety-nine million, two hundred ninety-six thousand, one hundred eighty-nine".