406985431 has 2 divisors, whose sum is σ = 406985432. Its totient is φ = 406985430.

The previous prime is 406985387. The next prime is 406985477. The reversal of 406985431 is 134589604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406985431 - 2¹³ = 406977239 is a prime.

It is a super-2 number, since 2×406985431² = 331274282092511522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406985531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203492715 + 203492716.

It is an arithmetic number, because the mean of its divisors is an integer number (203492716).

Almost surely, 2^406985431 is an apocalyptic number.

406985431 is a deficient number, since it is larger than the sum of its proper divisors (1).

406985431 is an equidigital number, since it uses as much as digits as its factorization.

406985431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 406985431 is about 20173.8799193412. The cubic root of 406985431 is about 741.0706628589.

The spelling of 406985431 in words is "four hundred six million, nine hundred eighty-five thousand, four hundred thirty-one".