74502991 has 2 divisors, whose sum is σ = 74502992. Its totient is φ = 74502990.

The previous prime is 74502983. The next prime is 74503043. The reversal of 74502991 is 19920547.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74502991 - 2³ = 74502983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74502991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74502931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37251495 + 37251496.

It is an arithmetic number, because the mean of its divisors is an integer number (37251496).

Almost surely, 2^74502991 is an apocalyptic number.

74502991 is a deficient number, since it is larger than the sum of its proper divisors (1).

74502991 is an equidigital number, since it uses as much as digits as its factorization.

74502991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 74502991 is about 8631.5115130549. The cubic root of 74502991 is about 420.7827259429.

The spelling of 74502991 in words is "seventy-four million, five hundred two thousand, nine hundred ninety-one".