74923987 has 4 divisors (see below), whose sum is σ = 74942496. Its totient is φ = 74905480.

The previous prime is 74923963. The next prime is 74923997. The reversal of 74923987 is 78932947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78932947 = 193 ⋅408979.

It is a cyclic number.

It is not a de Polignac number, because 74923987 - 2²³ = 66535379 is a prime.

It is a super-2 number, since 2×74923987² = 11227207655952338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74923987.

It is not an unprimeable number, because it can be changed into a prime (74923997) 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, 283 + ... + 12244.

It is an arithmetic number, because the mean of its divisors is an integer number (18735624).

Almost surely, 2^74923987 is an apocalyptic number.

74923987 is a deficient number, since it is larger than the sum of its proper divisors (18509).

74923987 is a wasteful number, since it uses less digits than its factorization.

74923987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18508.

The product of its digits is 762048, while the sum is 49.

The square root of 74923987 is about 8655.8643127073. The cubic root of 74923987 is about 421.5738137205.

The spelling of 74923987 in words is "seventy-four million, nine hundred twenty-three thousand, nine hundred eighty-seven".