74690845 has 4 divisors (see below), whose sum is σ = 89629020. Its totient is φ = 59752672.

The previous prime is 74690789. The next prime is 74690851. The reversal of 74690845 is 54809647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54809647 = 79 ⋅693793.

It can be written as a sum of positive squares in 2 ways, for example, as 15539364 + 59151481 = 3942^2 + 7691^2 .

It is a cyclic number.

It is not a de Polignac number, because 74690845 - 2⁷ = 74690717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7469080 + ... + 7469089.

It is an arithmetic number, because the mean of its divisors is an integer number (22407255).

Almost surely, 2^74690845 is an apocalyptic number.

It is an amenable number.

74690845 is a deficient number, since it is larger than the sum of its proper divisors (14938175).

74690845 is a wasteful number, since it uses less digits than its factorization.

74690845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14938174.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 74690845 is about 8642.3865338227. The cubic root of 74690845 is about 421.1360870361.

The spelling of 74690845 in words is "seventy-four million, six hundred ninety thousand, eight hundred forty-five".