71957849903 has 2 divisors, whose sum is σ = 71957849904. Its totient is φ = 71957849902.

The previous prime is 71957849833. The next prime is 71957849939. The reversal of 71957849903 is 30994875917.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71957849903 - 2⁸ = 71957849647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71957849003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35978924951 + 35978924952.

It is an arithmetic number, because the mean of its divisors is an integer number (35978924952).

Almost surely, 2^71957849903 is an apocalyptic number.

71957849903 is a deficient number, since it is larger than the sum of its proper divisors (1).

71957849903 is an equidigital number, since it uses as much as digits as its factorization.

71957849903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 71957849903 in words is "seventy-one billion, nine hundred fifty-seven million, eight hundred forty-nine thousand, nine hundred three".