397855799 has 8 divisors (see below), whose sum is σ = 443259648. Its totient is φ = 353991160.

The previous prime is 397855793. The next prime is 397855807. The reversal of 397855799 is 997558793.

It is a happy number.

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 397855799 - 2¹² = 397851703 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 (397855793) 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, 384257 + ... + 385290.

It is an arithmetic number, because the mean of its divisors is an integer number (55407456).

Almost surely, 2^397855799 is an apocalyptic number.

397855799 is a deficient number, since it is larger than the sum of its proper divisors (45403849).

397855799 is a wasteful number, since it uses less digits than its factorization.

397855799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769605.

The product of its digits is 21432600, while the sum is 62.

The square root of 397855799 is about 19946.3229443424. The cubic root of 397855799 is about 735.4873895689.

The spelling of 397855799 in words is "three hundred ninety-seven million, eight hundred fifty-five thousand, seven hundred ninety-nine".