91000675771 has 2 divisors, whose sum is σ = 91000675772. Its totient is φ = 91000675770.

The previous prime is 91000675721. The next prime is 91000675811. The reversal of 91000675771 is 17757600019.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91000675771 - 2⁷ = 91000675643 is a prime.

It is a super-2 number, since 2×91000675771² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91000675721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45500337885 + 45500337886.

It is an arithmetic number, because the mean of its divisors is an integer number (45500337886).

Almost surely, 2^91000675771 is an apocalyptic number.

91000675771 is a deficient number, since it is larger than the sum of its proper divisors (1).

91000675771 is an equidigital number, since it uses as much as digits as its factorization.

91000675771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92610, while the sum is 43.

The spelling of 91000675771 in words is "ninety-one billion, six hundred seventy-five thousand, seven hundred seventy-one".