74123491 has 4 divisors (see below), whose sum is σ = 79825312. Its totient is φ = 68421672.

The previous prime is 74123461. The next prime is 74123509. The reversal of 74123491 is 19432147.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74123491 - 2⁵ = 74123459 is a prime.

It is the 8610-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74123431) by changing a digit.

It is a nontrivial repunit in base 8609.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2850891 + ... + 2850916.

It is an arithmetic number, because the mean of its divisors is an integer number (19956328).

Almost surely, 2^74123491 is an apocalyptic number.

74123491 is a deficient number, since it is larger than the sum of its proper divisors (5701821).

74123491 is a wasteful number, since it uses less digits than its factorization.

74123491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5701820.

The product of its digits is 6048, while the sum is 31.

The square root of 74123491 is about 8609.5000435565. The cubic root of 74123491 is about 420.0670546756.

The spelling of 74123491 in words is "seventy-four million, one hundred twenty-three thousand, four hundred ninety-one".