71368657 has 2 divisors, whose sum is σ = 71368658. Its totient is φ = 71368656.

The previous prime is 71368639. The next prime is 71368711. The reversal of 71368657 is 75686317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37075921 + 34292736 = 6089^2 + 5856^2 .

It is a cyclic number.

It is not a de Polignac number, because 71368657 - 2⁷ = 71368529 is a prime.

It is not a weakly prime, because it can be changed into another prime (71368357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35684328 + 35684329.

It is an arithmetic number, because the mean of its divisors is an integer number (35684329).

Almost surely, 2^71368657 is an apocalyptic number.

It is an amenable number.

71368657 is a deficient number, since it is larger than the sum of its proper divisors (1).

71368657 is an equidigital number, since it uses as much as digits as its factorization.

71368657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 71368657 is about 8447.9972182761. The cubic root of 71368657 is about 414.7972242055.

The spelling of 71368657 in words is "seventy-one million, three hundred sixty-eight thousand, six hundred fifty-seven".