400710979 has 2 divisors, whose sum is σ = 400710980. Its totient is φ = 400710978.

The previous prime is 400710967. The next prime is 400710997. The reversal of 400710979 is 979017004.

Together with next prime (400710997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400710979 - 2¹³ = 400702787 is a prime.

It is a super-2 number, since 2×400710979² = 321138577382276882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (400710379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200355489 + 200355490.

It is an arithmetic number, because the mean of its divisors is an integer number (200355490).

Almost surely, 2^400710979 is an apocalyptic number.

400710979 is a deficient number, since it is larger than the sum of its proper divisors (1).

400710979 is an equidigital number, since it uses as much as digits as its factorization.

400710979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 400710979 is about 20017.7665837126. The cubic root of 400710979 is about 737.2425861765.

The spelling of 400710979 in words is "four hundred million, seven hundred ten thousand, nine hundred seventy-nine".