40791539 has 2 divisors, whose sum is σ = 40791540. Its totient is φ = 40791538.

The previous prime is 40791523. The next prime is 40791547. The reversal of 40791539 is 93519704.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40791539 - 2⁴ = 40791523 is a prime.

It is not a weakly prime, because it can be changed into another prime (40791599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20395769 + 20395770.

It is an arithmetic number, because the mean of its divisors is an integer number (20395770).

Almost surely, 2^40791539 is an apocalyptic number.

40791539 is a deficient number, since it is larger than the sum of its proper divisors (1).

40791539 is an equidigital number, since it uses as much as digits as its factorization.

40791539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 40791539 is about 6386.8254242620. The cubic root of 40791539 is about 344.2363252377.

The spelling of 40791539 in words is "forty million, seven hundred ninety-one thousand, five hundred thirty-nine".