74901985 has 12 divisors (see below), whose sum is σ = 91627452. Its totient is φ = 58779968.

The previous prime is 74901943. The next prime is 74901989. The reversal of 74901985 is 58910947.

It can be written as a sum of positive squares in 6 ways, for example, as 18696976 + 56205009 = 4324^2 + 7497^2 .

It is a de Polignac number, because none of the positive numbers 2^k-74901985 is a prime.

It is a super-2 number, since 2×74901985² = 11220614713880450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74901989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11379 + ... + 16711.

It is an arithmetic number, because the mean of its divisors is an integer number (7635621).

Almost surely, 2^74901985 is an apocalyptic number.

It is an amenable number.

74901985 is a deficient number, since it is larger than the sum of its proper divisors (16725467).

74901985 is an equidigital number, since it uses as much as digits as its factorization.

74901985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5444 (or 5391 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 74901985 is about 8654.5932891153. The cubic root of 74901985 is about 421.5325435590.

The spelling of 74901985 in words is "seventy-four million, nine hundred one thousand, nine hundred eighty-five".