71900186893 has 2 divisors, whose sum is σ = 71900186894. Its totient is φ = 71900186892.

The previous prime is 71900186857. The next prime is 71900186923. The reversal of 71900186893 is 39868100917.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71346149449 + 554037444 = 267107^2 + 23538^2 .

It is a cyclic number.

It is not a de Polignac number, because 71900186893 - 2³³ = 63310252301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71900186893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71900186993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35950093446 + 35950093447.

It is an arithmetic number, because the mean of its divisors is an integer number (35950093447).

Almost surely, 2^71900186893 is an apocalyptic number.

It is an amenable number.

71900186893 is a deficient number, since it is larger than the sum of its proper divisors (1).

71900186893 is an equidigital number, since it uses as much as digits as its factorization.

71900186893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 71900186893 in words is "seventy-one billion, nine hundred million, one hundred eighty-six thousand, eight hundred ninety-three".