397139705898 has 16 divisors (see below), whose sum is σ = 855377828256. Its totient is φ = 122196832560.

The previous prime is 397139705867. The next prime is 397139705903. The reversal of 397139705898 is 898507931793.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2545767268 + ... + 2545767423.

It is an arithmetic number, because the mean of its divisors is an integer number (53461114266).

Almost surely, 2^397139705898 is an apocalyptic number.

397139705898 is an abundant number, since it is smaller than the sum of its proper divisors (458238122358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397139705898 is a wasteful number, since it uses less digits than its factorization.

397139705898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091534709.

The product of its (nonzero) digits is 102876480, while the sum is 69.

The spelling of 397139705898 in words is "three hundred ninety-seven billion, one hundred thirty-nine million, seven hundred five thousand, eight hundred ninety-eight".