40709831 has 2 divisors, whose sum is σ = 40709832. Its totient is φ = 40709830.

The previous prime is 40709827. The next prime is 40709861. The reversal of 40709831 is 13890704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40709831 - 2² = 40709827 is a prime.

It is a super-2 number, since 2×40709831² = 3314580680097122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40709821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20354915 + 20354916.

It is an arithmetic number, because the mean of its divisors is an integer number (20354916).

Almost surely, 2^40709831 is an apocalyptic number.

40709831 is a deficient number, since it is larger than the sum of its proper divisors (1).

40709831 is an equidigital number, since it uses as much as digits as its factorization.

40709831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 40709831 is about 6380.4256127628. The cubic root of 40709831 is about 344.0063293184.

The spelling of 40709831 in words is "forty million, seven hundred nine thousand, eight hundred thirty-one".