91532887 has 2 divisors, whose sum is σ = 91532888. Its totient is φ = 91532886.

The previous prime is 91532873. The next prime is 91532897. The reversal of 91532887 is 78823519.

It is a strong prime.

It is an emirp because it is prime and its reverse (78823519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91532887 - 2¹⁵ = 91500119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91532807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45766443 + 45766444.

It is an arithmetic number, because the mean of its divisors is an integer number (45766444).

Almost surely, 2^91532887 is an apocalyptic number.

91532887 is a deficient number, since it is larger than the sum of its proper divisors (1).

91532887 is an equidigital number, since it uses as much as digits as its factorization.

91532887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 91532887 is about 9567.2821114463. The cubic root of 91532887 is about 450.6704196285.

The spelling of 91532887 in words is "ninety-one million, five hundred thirty-two thousand, eight hundred eighty-seven".