74703561 has 4 divisors (see below), whose sum is σ = 99604752. Its totient is φ = 49802372.

The previous prime is 74703529. The next prime is 74703631. The reversal of 74703561 is 16530747.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16530747 = 3 ⋅5510249.

It is a cyclic number.

It is not a de Polignac number, because 74703561 - 2⁵ = 74703529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74703511) 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, 12450591 + ... + 12450596.

It is an arithmetic number, because the mean of its divisors is an integer number (24901188).

Almost surely, 2^74703561 is an apocalyptic number.

It is an amenable number.

74703561 is a deficient number, since it is larger than the sum of its proper divisors (24901191).

74703561 is a wasteful number, since it uses less digits than its factorization.

74703561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24901190.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 74703561 is about 8643.1221789351. The cubic root of 74703561 is about 421.1599849342.

The spelling of 74703561 in words is "seventy-four million, seven hundred three thousand, five hundred sixty-one".