438498631 has 2 divisors, whose sum is σ = 438498632. Its totient is φ = 438498630.

The previous prime is 438498623. The next prime is 438498661. The reversal of 438498631 is 136894834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 438498631 - 2³ = 438498623 is a prime.

It is a super-2 number, since 2×438498631² = 384562098777748322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438498661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219249315 + 219249316.

It is an arithmetic number, because the mean of its divisors is an integer number (219249316).

Almost surely, 2^438498631 is an apocalyptic number.

438498631 is a deficient number, since it is larger than the sum of its proper divisors (1).

438498631 is an equidigital number, since it uses as much as digits as its factorization.

438498631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 46.

The square root of 438498631 is about 20940.3589033235. The cubic root of 438498631 is about 759.7244101197.

The spelling of 438498631 in words is "four hundred thirty-eight million, four hundred ninety-eight thousand, six hundred thirty-one".