40831237 has 2 divisors, whose sum is σ = 40831238. Its totient is φ = 40831236.

The previous prime is 40831199. The next prime is 40831249. The reversal of 40831237 is 73213804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39112516 + 1718721 = 6254^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 40831237 - 2¹⁵ = 40798469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40831537) 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, 20415618 + 20415619.

It is an arithmetic number, because the mean of its divisors is an integer number (20415619).

Almost surely, 2^40831237 is an apocalyptic number.

It is an amenable number.

40831237 is a deficient number, since it is larger than the sum of its proper divisors (1).

40831237 is an equidigital number, since it uses as much as digits as its factorization.

40831237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 40831237 is about 6389.9324722567. The cubic root of 40831237 is about 344.3479583796.

The spelling of 40831237 in words is "forty million, eight hundred thirty-one thousand, two hundred thirty-seven".