74698991 has 4 divisors (see below), whose sum is σ = 74800272. Its totient is φ = 74597712.

The previous prime is 74698973. The next prime is 74698993. The reversal of 74698991 is 19989647.

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 74698991 - 2²⁶ = 7590127 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 (74698993) 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, 49526 + ... + 51011.

It is an arithmetic number, because the mean of its divisors is an integer number (18700068).

Almost surely, 2^74698991 is an apocalyptic number.

74698991 is a deficient number, since it is larger than the sum of its proper divisors (101281).

74698991 is a wasteful number, since it uses less digits than its factorization.

74698991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101280.

The product of its digits is 979776, while the sum is 53.

The square root of 74698991 is about 8642.8578028335. The cubic root of 74698991 is about 421.1513965869.

The spelling of 74698991 in words is "seventy-four million, six hundred ninety-eight thousand, nine hundred ninety-one".