399954897 has 12 divisors (see below), whose sum is σ = 578275984. Its totient is φ = 266376600.

The previous prime is 399954881. The next prime is 399954943. The reversal of 399954897 is 798459993.

It is a happy number.

It is not a de Polignac number, because 399954897 - 2⁴ = 399954881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399954827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11683 + ... + 30600.

Almost surely, 2^399954897 is an apocalyptic number.

It is an amenable number.

399954897 is a deficient number, since it is larger than the sum of its proper divisors (178321087).

399954897 is a wasteful number, since it uses less digits than its factorization.

399954897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43340 (or 43337 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 63.

The square root of 399954897 is about 19998.8723932126. The cubic root of 399954897 is about 736.7786052083.

The spelling of 399954897 in words is "three hundred ninety-nine million, nine hundred fifty-four thousand, eight hundred ninety-seven".