406872637 has 2 divisors, whose sum is σ = 406872638. Its totient is φ = 406872636.

The previous prime is 406872619. The next prime is 406872649. The reversal of 406872637 is 736278604.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360278361 + 46594276 = 18981^2 + 6826^2 .

It is a cyclic number.

It is not a de Polignac number, because 406872637 - 2¹¹ = 406870589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 406872593 and 406872602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406872617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203436318 + 203436319.

It is an arithmetic number, because the mean of its divisors is an integer number (203436319).

Almost surely, 2^406872637 is an apocalyptic number.

It is an amenable number.

406872637 is a deficient number, since it is larger than the sum of its proper divisors (1).

406872637 is an equidigital number, since it uses as much as digits as its factorization.

406872637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 406872637 is about 20171.0841800831. The cubic root of 406872637 is about 741.0021951766.

The spelling of 406872637 in words is "four hundred six million, eight hundred seventy-two thousand, six hundred thirty-seven".