40672831 has 2 divisors, whose sum is σ = 40672832. Its totient is φ = 40672830.

The previous prime is 40672829. The next prime is 40672859. The reversal of 40672831 is 13827604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40672831 - 2¹ = 40672829 is a prime.

It is a super-2 number, since 2×40672831² = 3308558363109122, which contains 22 as substring.

Together with 40672829, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40672793 and 40672802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40672811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20336415 + 20336416.

It is an arithmetic number, because the mean of its divisors is an integer number (20336416).

Almost surely, 2^40672831 is an apocalyptic number.

40672831 is a deficient number, since it is larger than the sum of its proper divisors (1).

40672831 is an equidigital number, since it uses as much as digits as its factorization.

40672831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 40672831 is about 6377.5254605529. The cubic root of 40672831 is about 343.9020785602.

It can be divided in two parts, 406 and 72831, that added together give a palindrome (73237).

The spelling of 40672831 in words is "forty million, six hundred seventy-two thousand, eight hundred thirty-one".