74564087 has 4 divisors (see below), whose sum is σ = 80299800. Its totient is φ = 68828376.

The previous prime is 74564059. The next prime is 74564089. The reversal of 74564087 is 78046547.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74564087 - 2¹⁰ = 74563063 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 (74564089) 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, 2867837 + ... + 2867862.

It is an arithmetic number, because the mean of its divisors is an integer number (20074950).

Almost surely, 2^74564087 is an apocalyptic number.

74564087 is a deficient number, since it is larger than the sum of its proper divisors (5735713).

74564087 is a wasteful number, since it uses less digits than its factorization.

74564087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5735712.

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 74564087 is about 8635.0499129999. The cubic root of 74564087 is about 420.8977151399.

The spelling of 74564087 in words is "seventy-four million, five hundred sixty-four thousand, eighty-seven".