74872491 has 4 divisors (see below), whose sum is σ = 99829992. Its totient is φ = 49914992.

The previous prime is 74872481. The next prime is 74872493. The reversal of 74872491 is 19427847.

It is a happy number.

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 74872491 - 2¹¹ = 74870443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74872493) 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, 12478746 + ... + 12478751.

It is an arithmetic number, because the mean of its divisors is an integer number (24957498).

Almost surely, 2^74872491 is an apocalyptic number.

74872491 is a deficient number, since it is larger than the sum of its proper divisors (24957501).

74872491 is a wasteful number, since it uses less digits than its factorization.

74872491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24957500.

The product of its digits is 112896, while the sum is 42.

The square root of 74872491 is about 8652.8891706759. The cubic root of 74872491 is about 421.4772076287.

The spelling of 74872491 in words is "seventy-four million, eight hundred seventy-two thousand, four hundred ninety-one".