74143957 has 4 divisors (see below), whose sum is σ = 75721536. Its totient is φ = 72566380.

The previous prime is 74143921. The next prime is 74143969. The reversal of 74143957 is 75934147.

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: 75934147 = 509 ⋅149183.

It is a cyclic number.

It is not a de Polignac number, because 74143957 - 2¹⁵ = 74111189 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74143907) 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, 788719 + ... + 788812.

It is an arithmetic number, because the mean of its divisors is an integer number (18930384).

Almost surely, 2^74143957 is an apocalyptic number.

It is an amenable number.

74143957 is a deficient number, since it is larger than the sum of its proper divisors (1577579).

74143957 is a wasteful number, since it uses less digits than its factorization.

74143957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577578.

The product of its digits is 105840, while the sum is 40.

The square root of 74143957 is about 8610.6885322836. The cubic root of 74143957 is about 420.1057122415.

The spelling of 74143957 in words is "seventy-four million, one hundred forty-three thousand, nine hundred fifty-seven".