74770613 has 4 divisors (see below), whose sum is σ = 77348940. Its totient is φ = 72192288.

The previous prime is 74770589. The next prime is 74770649. The reversal of 74770613 is 31607747.

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 39225169 + 35545444 = 6263^2 + 5962^2 .

It is a cyclic number.

It is not a de Polignac number, because 74770613 - 2²⁶ = 7661749 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 (74770693) 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, 1289120 + ... + 1289177.

It is an arithmetic number, because the mean of its divisors is an integer number (19337235).

Almost surely, 2^74770613 is an apocalyptic number.

It is an amenable number.

74770613 is a deficient number, since it is larger than the sum of its proper divisors (2578327).

74770613 is a wasteful number, since it uses less digits than its factorization.

74770613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578326.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 74770613 is about 8647.0002312941. Note that the first 3 decimals coincide. The cubic root of 74770613 is about 421.2859547189.

The spelling of 74770613 in words is "seventy-four million, seven hundred seventy thousand, six hundred thirteen".