398799396947 has 54 divisors (see below), whose sum is σ = 484745165892. Its totient is φ = 327119156448.

The previous prime is 398799396907. The next prime is 398799396977. The reversal of 398799396947 is 749693997893.

It is a happy number.

It is not a de Polignac number, because 398799396947 - 2⁶ = 398799396883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398799396907) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 1149277628 + ... + 1149277974.

Almost surely, 2^398799396947 is an apocalyptic number.

398799396947 is a deficient number, since it is larger than the sum of its proper divisors (85945768945).

398799396947 is an equidigital number, since it uses as much as digits as its factorization.

398799396947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 550 counting only the distinct ones).

The product of its digits is 4999796928, while the sum is 83.

The spelling of 398799396947 in words is "three hundred ninety-eight billion, seven hundred ninety-nine million, three hundred ninety-six thousand, nine hundred forty-seven".