74740861 has 4 divisors (see below), whose sum is σ = 80490172. Its totient is φ = 68991552.

The previous prime is 74740847. The next prime is 74740877. The reversal of 74740861 is 16804747.

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 39564100 + 35176761 = 6290^2 + 5931^2 .

It is a cyclic number.

It is not a de Polignac number, because 74740861 - 2⁵ = 74740829 is a prime.

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 74740861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74740811) 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, 2874636 + ... + 2874661.

It is an arithmetic number, because the mean of its divisors is an integer number (20122543).

Almost surely, 2^74740861 is an apocalyptic number.

It is an amenable number.

74740861 is a deficient number, since it is larger than the sum of its proper divisors (5749311).

74740861 is a wasteful number, since it uses less digits than its factorization.

74740861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5749310.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 74740861 is about 8645.2796947236. The cubic root of 74740861 is about 421.2300692933.

The spelling of 74740861 in words is "seventy-four million, seven hundred forty thousand, eight hundred sixty-one".