74672991 has 6 divisors (see below), whose sum is σ = 107861000. Its totient is φ = 49781988.

The previous prime is 74672987. The next prime is 74673031. The reversal of 74672991 is 19927647.

It is not a de Polignac number, because 74672991 - 2² = 74672987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74672911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4148491 + ... + 4148508.

Almost surely, 2^74672991 is an apocalyptic number.

74672991 is a deficient number, since it is larger than the sum of its proper divisors (33188009).

74672991 is a wasteful number, since it uses less digits than its factorization.

74672991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8297005 (or 8297002 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 74672991 is about 8641.3535398108. The cubic root of 74672991 is about 421.1025284258.

It can be divided in two parts, 746 and 72991, that added together give a palindrome (73737).

The spelling of 74672991 in words is "seventy-four million, six hundred seventy-two thousand, nine hundred ninety-one".