398962979 has 2 divisors, whose sum is σ = 398962980. Its totient is φ = 398962978.

The previous prime is 398962973. The next prime is 398963009. The reversal of 398962979 is 979269893.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398962979 is a prime.

It is a super-2 number, since 2×398962979² = 318342917225108882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (398962973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199481489 + 199481490.

It is an arithmetic number, because the mean of its divisors is an integer number (199481490).

Almost surely, 2^398962979 is an apocalyptic number.

398962979 is a deficient number, since it is larger than the sum of its proper divisors (1).

398962979 is an equidigital number, since it uses as much as digits as its factorization.

398962979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 62.

The square root of 398962979 is about 19974.0576498617. The cubic root of 398962979 is about 736.1690123386.

It can be divided in two parts, 39896 and 2979, that added together give a cube (42875 = 35³).

The spelling of 398962979 in words is "three hundred ninety-eight million, nine hundred sixty-two thousand, nine hundred seventy-nine".