74511491 has 2 divisors, whose sum is σ = 74511492. Its totient is φ = 74511490.

The previous prime is 74511449. The next prime is 74511499. The reversal of 74511491 is 19411547.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19411547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74511491 - 2⁶ = 74511427 is a prime.

It is not a weakly prime, because it can be changed into another prime (74511499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37255745 + 37255746.

It is an arithmetic number, because the mean of its divisors is an integer number (37255746).

Almost surely, 2^74511491 is an apocalyptic number.

74511491 is a deficient number, since it is larger than the sum of its proper divisors (1).

74511491 is an equidigital number, since it uses as much as digits as its factorization.

74511491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The square root of 74511491 is about 8632.0038809074. The cubic root of 74511491 is about 420.7987276144.

The spelling of 74511491 in words is "seventy-four million, five hundred eleven thousand, four hundred ninety-one".