91676297727 has 12 divisors (see below), whose sum is σ = 151338650320. Its totient is φ = 52386455808.

The previous prime is 91676297723. The next prime is 91676297753. The reversal of 91676297727 is 72779267619.

It is not a de Polignac number, because 91676297727 - 2² = 91676297723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 1455179329 = 91676297727 / (9 + 1 + 6 + 7 + 6 + 2 + 9 + 7 + 7 + 2 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91676297723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 727589602 + ... + 727589727.

Almost surely, 2^91676297727 is an apocalyptic number.

91676297727 is a deficient number, since it is larger than the sum of its proper divisors (59662352593).

91676297727 is a wasteful number, since it uses less digits than its factorization.

91676297727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455179342 (or 1455179339 counting only the distinct ones).

The product of its digits is 28005264, while the sum is 63.

It can be divided in two parts, 91676 and 297727, that added together give a triangular number (389403 = T₈₈₂).

The spelling of 91676297727 in words is "ninety-one billion, six hundred seventy-six million, two hundred ninety-seven thousand, seven hundred twenty-seven".