71913493 has 2 divisors, whose sum is σ = 71913494. Its totient is φ = 71913492.

The previous prime is 71913473. The next prime is 71913503. The reversal of 71913493 is 39431917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40475044 + 31438449 = 6362^2 + 5607^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71913493 is a prime.

It is a super-2 number, since 2×71913493² = 10343100950922098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71913473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35956746 + 35956747.

It is an arithmetic number, because the mean of its divisors is an integer number (35956747).

Almost surely, 2^71913493 is an apocalyptic number.

It is an amenable number.

71913493 is a deficient number, since it is larger than the sum of its proper divisors (1).

71913493 is an equidigital number, since it uses as much as digits as its factorization.

71913493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 71913493 is about 8480.1823683220. The cubic root of 71913493 is about 415.8500850499.

The spelling of 71913493 in words is "seventy-one million, nine hundred thirteen thousand, four hundred ninety-three".