398772479 has 4 divisors (see below), whose sum is σ = 455739984. Its totient is φ = 341804976.

The previous prime is 398772469. The next prime is 398772509. The reversal of 398772479 is 974277893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974277893 = 12923 ⋅75391.

It is a cyclic number.

It is not a de Polignac number, because 398772479 - 2⁸ = 398772223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398772419) 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, 28483742 + ... + 28483755.

It is an arithmetic number, because the mean of its divisors is an integer number (113934996).

Almost surely, 2^398772479 is an apocalyptic number.

398772479 is a deficient number, since it is larger than the sum of its proper divisors (56967505).

398772479 is an equidigital number, since it uses as much as digits as its factorization.

398772479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56967504.

The product of its digits is 5334336, while the sum is 56.

The square root of 398772479 is about 19969.2883949329. The cubic root of 398772479 is about 736.0518230828.

The spelling of 398772479 in words is "three hundred ninety-eight million, seven hundred seventy-two thousand, four hundred seventy-nine".