71311901 has 2 divisors, whose sum is σ = 71311902. Its totient is φ = 71311900.

The previous prime is 71311879. The next prime is 71311909. The reversal of 71311901 is 10911317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69139225 + 2172676 = 8315^2 + 1474^2 .

It is an emirp because it is prime and its reverse (10911317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71311901 - 2¹⁴ = 71295517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71311909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35655950 + 35655951.

It is an arithmetic number, because the mean of its divisors is an integer number (35655951).

Almost surely, 2^71311901 is an apocalyptic number.

It is an amenable number.

71311901 is a deficient number, since it is larger than the sum of its proper divisors (1).

71311901 is an equidigital number, since it uses as much as digits as its factorization.

71311901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189, while the sum is 23.

The square root of 71311901 is about 8444.6374108069. The cubic root of 71311901 is about 414.6872390680.

The spelling of 71311901 in words is "seventy-one million, three hundred eleven thousand, nine hundred one".