74917985 has 4 divisors (see below), whose sum is σ = 89901588. Its totient is φ = 59934384.

The previous prime is 74917967. The next prime is 74917987. The reversal of 74917985 is 58971947.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36192256 + 38725729 = 6016^2 + 6223^2 .

It is a cyclic number.

It is not a de Polignac number, because 74917985 - 2¹² = 74913889 is a prime.

It is a super-2 number, since 2×74917985² = 11225408952920450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74917987) 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, 7491794 + ... + 7491803.

It is an arithmetic number, because the mean of its divisors is an integer number (22475397).

Almost surely, 2^74917985 is an apocalyptic number.

It is an amenable number.

74917985 is a deficient number, since it is larger than the sum of its proper divisors (14983603).

74917985 is a wasteful number, since it uses less digits than its factorization.

74917985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14983602.

The product of its digits is 635040, while the sum is 50.

The square root of 74917985 is about 8655.5176043955. The cubic root of 74917985 is about 421.5625562951.

The spelling of 74917985 in words is "seventy-four million, nine hundred seventeen thousand, nine hundred eighty-five".