401349979 has 2 divisors, whose sum is σ = 401349980. Its totient is φ = 401349978.

The previous prime is 401349959. The next prime is 401350021. The reversal of 401349979 is 979943104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401349979 - 2⁵ = 401349947 is a prime.

It is a super-2 number, since 2×401349979² = 322163611286600882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401349959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200674989 + 200674990.

It is an arithmetic number, because the mean of its divisors is an integer number (200674990).

Almost surely, 2^401349979 is an apocalyptic number.

401349979 is a deficient number, since it is larger than the sum of its proper divisors (1).

401349979 is an equidigital number, since it uses as much as digits as its factorization.

401349979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 401349979 is about 20033.7210472743. The cubic root of 401349979 is about 737.6342631742.

The spelling of 401349979 in words is "four hundred one million, three hundred forty-nine thousand, nine hundred seventy-nine".