399119975 has 6 divisors (see below), whose sum is σ = 494908800. Its totient is φ = 319295960.

The previous prime is 399119971. The next prime is 399119993. The reversal of 399119975 is 579911993.

It is a happy number.

It is not a de Polignac number, because 399119975 - 2² = 399119971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399119971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7982375 + ... + 7982424.

It is an arithmetic number, because the mean of its divisors is an integer number (82484800).

Almost surely, 2^399119975 is an apocalyptic number.

399119975 is a deficient number, since it is larger than the sum of its proper divisors (95788825).

399119975 is a wasteful number, since it uses less digits than its factorization.

399119975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15964809 (or 15964804 counting only the distinct ones).

The product of its digits is 688905, while the sum is 53.

The square root of 399119975 is about 19977.9872609830. The cubic root of 399119975 is about 736.2655630125.

The spelling of 399119975 in words is "three hundred ninety-nine million, one hundred nineteen thousand, nine hundred seventy-five".