91884615007 has 2 divisors, whose sum is σ = 91884615008. Its totient is φ = 91884615006.

The previous prime is 91884614989. The next prime is 91884615019. The reversal of 91884615007 is 70051648819.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91884615007 is a prime.

It is a super-2 number, since 2×91884615007² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91884615037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45942307503 + 45942307504.

It is an arithmetic number, because the mean of its divisors is an integer number (45942307504).

Almost surely, 2^91884615007 is an apocalyptic number.

91884615007 is a deficient number, since it is larger than the sum of its proper divisors (1).

91884615007 is an equidigital number, since it uses as much as digits as its factorization.

91884615007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 91884615007 in words is "ninety-one billion, eight hundred eighty-four million, six hundred fifteen thousand, seven".