71257679 has 2 divisors, whose sum is σ = 71257680. Its totient is φ = 71257678.

The previous prime is 71257633. The next prime is 71257717. The reversal of 71257679 is 97675217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71257679 - 2¹² = 71253583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71257279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35628839 + 35628840.

It is an arithmetic number, because the mean of its divisors is an integer number (35628840).

Almost surely, 2^71257679 is an apocalyptic number.

71257679 is a deficient number, since it is larger than the sum of its proper divisors (1).

71257679 is an equidigital number, since it uses as much as digits as its factorization.

71257679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185220, while the sum is 44.

The square root of 71257679 is about 8441.4263605151. The cubic root of 71257679 is about 414.5821099454.

The spelling of 71257679 in words is "seventy-one million, two hundred fifty-seven thousand, six hundred seventy-nine".