91000100951 has 2 divisors, whose sum is σ = 91000100952. Its totient is φ = 91000100950.

The previous prime is 91000100903. The next prime is 91000100963. The reversal of 91000100951 is 15900100019.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91000100951 - 2¹⁸ = 90999838807 is a prime.

It is a super-2 number, since 2×91000100951² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91000100951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91000102951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45500050475 + 45500050476.

It is an arithmetic number, because the mean of its divisors is an integer number (45500050476).

Almost surely, 2^91000100951 is an apocalyptic number.

91000100951 is a deficient number, since it is larger than the sum of its proper divisors (1).

91000100951 is an equidigital number, since it uses as much as digits as its factorization.

91000100951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 26.

The spelling of 91000100951 in words is "ninety-one billion, one hundred thousand, nine hundred fifty-one".