397981599 has 16 divisors (see below), whose sum is σ = 533998080. Its totient is φ = 263649600.

The previous prime is 397981579. The next prime is 397981613. The reversal of 397981599 is 995189793.

It is not a de Polignac number, because 397981599 - 2⁸ = 397981343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397981579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553162 + ... + 553880.

It is an arithmetic number, because the mean of its divisors is an integer number (33374880).

Almost surely, 2^397981599 is an apocalyptic number.

397981599 is a deficient number, since it is larger than the sum of its proper divisors (136016481).

397981599 is a wasteful number, since it uses less digits than its factorization.

397981599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630.

The product of its digits is 5511240, while the sum is 60.

The square root of 397981599 is about 19949.4761585361. The cubic root of 397981599 is about 735.5649005361.

The spelling of 397981599 in words is "three hundred ninety-seven million, nine hundred eighty-one thousand, five hundred ninety-nine".