91512461 has 2 divisors, whose sum is σ = 91512462. Its totient is φ = 91512460.

The previous prime is 91512409. The next prime is 91512571. The reversal of 91512461 is 16421519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68376361 + 23136100 = 8269^2 + 4810^2 .

It is a cyclic number.

It is not a de Polignac number, because 91512461 - 2¹⁰ = 91511437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91512401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45756230 + 45756231.

It is an arithmetic number, because the mean of its divisors is an integer number (45756231).

Almost surely, 2^91512461 is an apocalyptic number.

It is an amenable number.

91512461 is a deficient number, since it is larger than the sum of its proper divisors (1).

91512461 is an equidigital number, since it uses as much as digits as its factorization.

91512461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 91512461 is about 9566.2145595842. The cubic root of 91512461 is about 450.6368940506.

The spelling of 91512461 in words is "ninety-one million, five hundred twelve thousand, four hundred sixty-one".