400951123 has 2 divisors, whose sum is σ = 400951124. Its totient is φ = 400951122.

The previous prime is 400951121. The next prime is 400951181. The reversal of 400951123 is 321159004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400951123 - 2¹ = 400951121 is a prime.

It is a super-2 number, since 2×400951123² = 321523606069922258, which contains 22 as substring.

Together with 400951121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (400951121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200475561 + 200475562.

It is an arithmetic number, because the mean of its divisors is an integer number (200475562).

Almost surely, 2^400951123 is an apocalyptic number.

400951123 is a deficient number, since it is larger than the sum of its proper divisors (1).

400951123 is an equidigital number, since it uses as much as digits as its factorization.

400951123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 400951123 is about 20023.7639568589. The cubic root of 400951123 is about 737.3898319782.

The spelling of 400951123 in words is "four hundred million, nine hundred fifty-one thousand, one hundred twenty-three".