397706899 has 4 divisors (see below), whose sum is σ = 411420960. Its totient is φ = 383992840.

The previous prime is 397706893. The next prime is 397706921. The reversal of 397706899 is 998607793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397706899 - 2¹⁵ = 397674131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397706893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6856987 + ... + 6857044.

It is an arithmetic number, because the mean of its divisors is an integer number (102855240).

Almost surely, 2^397706899 is an apocalyptic number.

397706899 is a deficient number, since it is larger than the sum of its proper divisors (13714061).

397706899 is a wasteful number, since it uses less digits than its factorization.

397706899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13714060.

The product of its (nonzero) digits is 5143824, while the sum is 58.

The square root of 397706899 is about 19942.5900775200. The cubic root of 397706899 is about 735.3956245479.

The spelling of 397706899 in words is "three hundred ninety-seven million, seven hundred six thousand, eight hundred ninety-nine".