399961597 has 8 divisors (see below), whose sum is σ = 471844352. Its totient is φ = 331765200.

The previous prime is 399961589. The next prime is 399961603. The reversal of 399961597 is 795169993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399961597 - 2³ = 399961589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399961517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921354 + ... + 921787.

It is an arithmetic number, because the mean of its divisors is an integer number (58980544).

Almost surely, 2^399961597 is an apocalyptic number.

It is an amenable number.

399961597 is a deficient number, since it is larger than the sum of its proper divisors (71882755).

399961597 is a wasteful number, since it uses less digits than its factorization.

399961597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843179.

The product of its digits is 4133430, while the sum is 58.

The square root of 399961597 is about 19999.0399019553. The cubic root of 399961597 is about 736.7827193298.

The spelling of 399961597 in words is "three hundred ninety-nine million, nine hundred sixty-one thousand, five hundred ninety-seven".