74622157 has 4 divisors (see below), whose sum is σ = 76357600. Its totient is φ = 72886716.

The previous prime is 74622131. The next prime is 74622167. The reversal of 74622157 is 75122647.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75122647 = 2027 ⋅37061.

It is a cyclic number.

It is not a de Polignac number, because 74622157 - 2⁷ = 74622029 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 (74622167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867657 + ... + 867742.

It is an arithmetic number, because the mean of its divisors is an integer number (19089400).

Almost surely, 2^74622157 is an apocalyptic number.

It is an amenable number.

74622157 is a deficient number, since it is larger than the sum of its proper divisors (1735443).

74622157 is a wasteful number, since it uses less digits than its factorization.

74622157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735442.

The product of its digits is 23520, while the sum is 34.

The square root of 74622157 is about 8638.4117174397. The cubic root of 74622157 is about 421.0069508729.

The spelling of 74622157 in words is "seventy-four million, six hundred twenty-two thousand, one hundred fifty-seven".