406632431 has 2 divisors, whose sum is σ = 406632432. Its totient is φ = 406632430.

The previous prime is 406632427. The next prime is 406632463. The reversal of 406632431 is 134236604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406632431 - 2² = 406632427 is a prime.

It is a super-2 number, since 2×406632431² = 330699867881939522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 406632394 and 406632403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406632481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203316215 + 203316216.

It is an arithmetic number, because the mean of its divisors is an integer number (203316216).

Almost surely, 2^406632431 is an apocalyptic number.

406632431 is a deficient number, since it is larger than the sum of its proper divisors (1).

406632431 is an equidigital number, since it uses as much as digits as its factorization.

406632431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 406632431 is about 20165.1290846352. The cubic root of 406632431 is about 740.8563442837.

The spelling of 406632431 in words is "four hundred six million, six hundred thirty-two thousand, four hundred thirty-one".