71913749 has 2 divisors, whose sum is σ = 71913750. Its totient is φ = 71913748.

The previous prime is 71913733. The next prime is 71913761. The reversal of 71913749 is 94731917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66994225 + 4919524 = 8185^2 + 2218^2 .

It is a cyclic number.

It is not a de Polignac number, because 71913749 - 2⁴ = 71913733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71913719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35956874 + 35956875.

It is an arithmetic number, because the mean of its divisors is an integer number (35956875).

Almost surely, 2^71913749 is an apocalyptic number.

It is an amenable number.

71913749 is a deficient number, since it is larger than the sum of its proper divisors (1).

71913749 is an equidigital number, since it uses as much as digits as its factorization.

71913749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 71913749 is about 8480.1974623236. The cubic root of 71913749 is about 415.8505785016.

The spelling of 71913749 in words is "seventy-one million, nine hundred thirteen thousand, seven hundred forty-nine".