91480957287 has 4 divisors (see below), whose sum is σ = 121974609720. Its totient is φ = 60987304856.

The previous prime is 91480957283. The next prime is 91480957291. The reversal of 91480957287 is 78275908419.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (91480957283) and next prime (91480957291).

It is a cyclic number.

It is not a de Polignac number, because 91480957287 - 2² = 91480957283 is a prime.

It is a super-2 number, since 2×91480957287² (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 91480957287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91480957283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15246826212 + ... + 15246826217.

It is an arithmetic number, because the mean of its divisors is an integer number (30493652430).

Almost surely, 2^91480957287 is an apocalyptic number.

91480957287 is a deficient number, since it is larger than the sum of its proper divisors (30493652433).

91480957287 is a wasteful number, since it uses less digits than its factorization.

91480957287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30493652432.

The product of its (nonzero) digits is 10160640, while the sum is 60.

The spelling of 91480957287 in words is "ninety-one billion, four hundred eighty million, nine hundred fifty-seven thousand, two hundred eighty-seven".