74090791 has 2 divisors, whose sum is σ = 74090792. Its totient is φ = 74090790.

The previous prime is 74090789. The next prime is 74090801. The reversal of 74090791 is 19709047.

It is a weak prime.

It is an emirp because it is prime and its reverse (19709047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74090791 - 2¹ = 74090789 is a prime.

It is a super-2 number, since 2×74090791² = 10978890622011362, which contains 22 as substring.

Together with 74090789, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 74090791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74093791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37045395 + 37045396.

It is an arithmetic number, because the mean of its divisors is an integer number (37045396).

Almost surely, 2^74090791 is an apocalyptic number.

74090791 is a deficient number, since it is larger than the sum of its proper divisors (1).

74090791 is an equidigital number, since it uses as much as digits as its factorization.

74090791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 74090791 is about 8607.6007690877. The cubic root of 74090791 is about 420.0052739323.

The spelling of 74090791 in words is "seventy-four million, ninety thousand, seven hundred ninety-one".