74905387 has 4 divisors (see below), whose sum is σ = 74927160. Its totient is φ = 74883616.

The previous prime is 74905361. The next prime is 74905409. The reversal of 74905387 is 78350947.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74905387 is a prime.

It is a super-2 number, since 2×74905387² = 11221634003239538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74905307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4462 + ... + 13027.

It is an arithmetic number, because the mean of its divisors is an integer number (18731790).

Almost surely, 2^74905387 is an apocalyptic number.

74905387 is a deficient number, since it is larger than the sum of its proper divisors (21773).

74905387 is a wasteful number, since it uses less digits than its factorization.

74905387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21772.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 74905387 is about 8654.7898299150. The cubic root of 74905387 is about 421.5389253748.

The spelling of 74905387 in words is "seventy-four million, nine hundred five thousand, three hundred eighty-seven".