40312039 has 2 divisors, whose sum is σ = 40312040. Its totient is φ = 40312038.

The previous prime is 40312009. The next prime is 40312043. The reversal of 40312039 is 93021304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40312039 - 2⁵ = 40312007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40312009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20156019 + 20156020.

It is an arithmetic number, because the mean of its divisors is an integer number (20156020).

Almost surely, 2^40312039 is an apocalyptic number.

40312039 is a deficient number, since it is larger than the sum of its proper divisors (1).

40312039 is an equidigital number, since it uses as much as digits as its factorization.

40312039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 40312039 is about 6349.1762457818. The cubic root of 40312039 is about 342.8821854807.

The spelling of 40312039 in words is "forty million, three hundred twelve thousand, thirty-nine".