73957157 has 4 divisors (see below), whose sum is σ = 78307596. Its totient is φ = 69606720.

The previous prime is 73957133. The next prime is 73957159. The reversal of 73957157 is 75175937.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75175937 = 23 ⋅3268519.

It can be written as a sum of positive squares in 2 ways, for example, as 27730756 + 46226401 = 5266^2 + 6799^2 .

It is a cyclic number.

It is not a de Polignac number, because 73957157 - 2¹⁴ = 73940773 is a prime.

It is a super-2 number, since 2×73957157² = 10939322143045298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73957159) 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, 2175194 + ... + 2175227.

It is an arithmetic number, because the mean of its divisors is an integer number (19576899).

Almost surely, 2^73957157 is an apocalyptic number.

It is an amenable number.

73957157 is a deficient number, since it is larger than the sum of its proper divisors (4350439).

73957157 is a wasteful number, since it uses less digits than its factorization.

73957157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4350438.

The product of its digits is 231525, while the sum is 44.

The square root of 73957157 is about 8599.8347077139. The cubic root of 73957157 is about 419.7526075195.

The spelling of 73957157 in words is "seventy-three million, nine hundred fifty-seven thousand, one hundred fifty-seven".