71313757 has 4 divisors (see below), whose sum is σ = 71334880. Its totient is φ = 71292636.

The previous prime is 71313751. The next prime is 71313769. The reversal of 71313757 is 75731317.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 71313757 - 2⁷ = 71313629 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 (71313751) 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, 4233 + ... + 12670.

It is an arithmetic number, because the mean of its divisors is an integer number (17833720).

Almost surely, 2^71313757 is an apocalyptic number.

It is an amenable number.

71313757 is a deficient number, since it is larger than the sum of its proper divisors (21123).

71313757 is a wasteful number, since it uses less digits than its factorization.

71313757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21122.

The product of its digits is 15435, while the sum is 34.

The square root of 71313757 is about 8444.7473023176. The cubic root of 71313757 is about 414.6908366575.

The spelling of 71313757 in words is "seventy-one million, three hundred thirteen thousand, seven hundred fifty-seven".