91516487 has 2 divisors, whose sum is σ = 91516488. Its totient is φ = 91516486.

The previous prime is 91516463. The next prime is 91516511. The reversal of 91516487 is 78461519.

It is a balanced prime because it is at equal distance from previous prime (91516463) and next prime (91516511).

It is a cyclic number.

It is not a de Polignac number, because 91516487 - 2¹² = 91512391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91516987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45758243 + 45758244.

It is an arithmetic number, because the mean of its divisors is an integer number (45758244).

Almost surely, 2^91516487 is an apocalyptic number.

91516487 is a deficient number, since it is larger than the sum of its proper divisors (1).

91516487 is an equidigital number, since it uses as much as digits as its factorization.

91516487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 91516487 is about 9566.4249853328. The cubic root of 91516487 is about 450.6435023948.

The spelling of 91516487 in words is "ninety-one million, five hundred sixteen thousand, four hundred eighty-seven".