74157823 has 4 divisors (see below), whose sum is σ = 74838280. Its totient is φ = 73477368.

The previous prime is 74157821. The next prime is 74157829. The reversal of 74157823 is 32875147.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32875147 = 971 ⋅33857.

It is a cyclic number.

It is not a de Polignac number, because 74157823 - 2¹ = 74157821 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 (74157821) 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, 340065 + ... + 340282.

It is an arithmetic number, because the mean of its divisors is an integer number (18709570).

Almost surely, 2^74157823 is an apocalyptic number.

74157823 is a deficient number, since it is larger than the sum of its proper divisors (680457).

74157823 is a wasteful number, since it uses less digits than its factorization.

74157823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680456.

The product of its digits is 47040, while the sum is 37.

The square root of 74157823 is about 8611.4936567357. The cubic root of 74157823 is about 420.1318992384.

It can be divided in two parts, 741 and 57823, that added together give a square (58564 = 242²).

The spelling of 74157823 in words is "seventy-four million, one hundred fifty-seven thousand, eight hundred twenty-three".