74045591 has 4 divisors (see below), whose sum is σ = 78401232. Its totient is φ = 69689952.

The previous prime is 74045513. The next prime is 74045593. The reversal of 74045591 is 19554047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19554047 = 151 ⋅129497.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74045591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74045593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2177795 + ... + 2177828.

It is an arithmetic number, because the mean of its divisors is an integer number (19600308).

Almost surely, 2^74045591 is an apocalyptic number.

74045591 is a deficient number, since it is larger than the sum of its proper divisors (4355641).

74045591 is a wasteful number, since it uses less digits than its factorization.

74045591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4355640.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 74045591 is about 8604.9747820665. The cubic root of 74045591 is about 419.9198467604.

The spelling of 74045591 in words is "seventy-four million, forty-five thousand, five hundred ninety-one".