400546631 has 2 divisors, whose sum is σ = 400546632. Its totient is φ = 400546630.

The previous prime is 400546613. The next prime is 400546651. The reversal of 400546631 is 136645004.

It is a happy number.

Together with previous prime (400546613) 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 a de Polignac number, because none of the positive numbers 2^k-400546631 is a prime.

It is a super-2 number, since 2×400546631² = 320875207210900322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400546594 and 400546603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400546651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200273315 + 200273316.

It is an arithmetic number, because the mean of its divisors is an integer number (200273316).

Almost surely, 2^400546631 is an apocalyptic number.

400546631 is a deficient number, since it is larger than the sum of its proper divisors (1).

400546631 is an equidigital number, since it uses as much as digits as its factorization.

400546631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 400546631 is about 20013.6611093523. The cubic root of 400546631 is about 737.1417812576.

The spelling of 400546631 in words is "four hundred million, five hundred forty-six thousand, six hundred thirty-one".