74091439 has 2 divisors, whose sum is σ = 74091440. Its totient is φ = 74091438.

The previous prime is 74091377. The next prime is 74091461. The reversal of 74091439 is 93419047.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74091439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74091398 and 74091407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74091499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37045719 + 37045720.

It is an arithmetic number, because the mean of its divisors is an integer number (37045720).

Almost surely, 2^74091439 is an apocalyptic number.

74091439 is a deficient number, since it is larger than the sum of its proper divisors (1).

74091439 is an equidigital number, since it uses as much as digits as its factorization.

74091439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 74091439 is about 8607.6384101564. The cubic root of 74091439 is about 420.0064983877.

The spelling of 74091439 in words is "seventy-four million, ninety-one thousand, four hundred thirty-nine".