74890487 has 4 divisors (see below), whose sum is σ = 85589136. Its totient is φ = 64191840.

The previous prime is 74890483. The next prime is 74890511. The reversal of 74890487 is 78409847.

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 74890487 - 2² = 74890483 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 (74890483) 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, 5349314 + ... + 5349327.

It is an arithmetic number, because the mean of its divisors is an integer number (21397284).

Almost surely, 2^74890487 is an apocalyptic number.

74890487 is a deficient number, since it is larger than the sum of its proper divisors (10698649).

74890487 is a wasteful number, since it uses less digits than its factorization.

74890487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10698648.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 74890487 is about 8653.9289920822. The cubic root of 74890487 is about 421.5109730171.

The spelling of 74890487 in words is "seventy-four million, eight hundred ninety thousand, four hundred eighty-seven".