74620891 has 4 divisors (see below), whose sum is σ = 74638984. Its totient is φ = 74602800.

The previous prime is 74620883. The next prime is 74620963. The reversal of 74620891 is 19802647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19802647 = 97 ⋅204151.

It is a cyclic number.

It is not a de Polignac number, because 74620891 - 2³ = 74620883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74620891.

It is not an unprimeable number, because it can be changed into a prime (74620811) 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 3 ways as a sum of consecutive naturals, for example, 496 + ... + 12226.

It is an arithmetic number, because the mean of its divisors is an integer number (18659746).

Almost surely, 2^74620891 is an apocalyptic number.

74620891 is a deficient number, since it is larger than the sum of its proper divisors (18093).

74620891 is a wasteful number, since it uses less digits than its factorization.

74620891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18092.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 74620891 is about 8638.3384397695. The cubic root of 74620891 is about 421.0045699991.

The spelling of 74620891 in words is "seventy-four million, six hundred twenty thousand, eight hundred ninety-one".