71390757 has 8 divisors (see below), whose sum is σ = 95393376. Its totient is φ = 47490992.

The previous prime is 71390747. The next prime is 71390777. The reversal of 71390757 is 75709317.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71390757 - 2⁴ = 71390741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71390747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24078 + ... + 26879.

It is an arithmetic number, because the mean of its divisors is an integer number (11924172).

Almost surely, 2^71390757 is an apocalyptic number.

It is an amenable number.

71390757 is a deficient number, since it is larger than the sum of its proper divisors (24002619).

71390757 is a wasteful number, since it uses less digits than its factorization.

71390757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51427.

The product of its (nonzero) digits is 46305, while the sum is 39.

The square root of 71390757 is about 8449.3051193574. The cubic root of 71390757 is about 414.8400351209.

The spelling of 71390757 in words is "seventy-one million, three hundred ninety thousand, seven hundred fifty-seven".