74243691 has 24 divisors (see below), whose sum is σ = 110283264. Its totient is φ = 48106800.

The previous prime is 74243681. The next prime is 74243693. The reversal of 74243691 is 19634247.

It is not a de Polignac number, because 74243691 - 2⁶ = 74243627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74243693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70116 + ... + 71166.

It is an arithmetic number, because the mean of its divisors is an integer number (4595136).

Almost surely, 2^74243691 is an apocalyptic number.

74243691 is a deficient number, since it is larger than the sum of its proper divisors (36039573).

74243691 is a wasteful number, since it uses less digits than its factorization.

74243691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1268 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 74243691 is about 8616.4778767197. The cubic root of 74243691 is about 420.2939948395.

The spelling of 74243691 in words is "seventy-four million, two hundred forty-three thousand, six hundred ninety-one".