71657401 has 2 divisors, whose sum is σ = 71657402. Its totient is φ = 71657400.

The previous prime is 71657359. The next prime is 71657413. The reversal of 71657401 is 10475617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71233600 + 423801 = 8440^2 + 651^2 .

It is a cyclic number.

It is not a de Polignac number, because 71657401 - 2⁷ = 71657273 is a prime.

It is not a weakly prime, because it can be changed into another prime (71657441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35828700 + 35828701.

It is an arithmetic number, because the mean of its divisors is an integer number (35828701).

Almost surely, 2^71657401 is an apocalyptic number.

It is an amenable number.

71657401 is a deficient number, since it is larger than the sum of its proper divisors (1).

71657401 is an equidigital number, since it uses as much as digits as its factorization.

71657401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 71657401 is about 8465.0694622076. The cubic root of 71657401 is about 415.3558683607.

The spelling of 71657401 in words is "seventy-one million, six hundred fifty-seven thousand, four hundred one".