91461511 has 2 divisors, whose sum is σ = 91461512. Its totient is φ = 91461510.

The previous prime is 91461457. The next prime is 91461551. The reversal of 91461511 is 11516419.

It is a strong prime.

It is an emirp because it is prime and its reverse (11516419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91461511 - 2¹⁷ = 91330439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91461511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91461551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45730755 + 45730756.

It is an arithmetic number, because the mean of its divisors is an integer number (45730756).

Almost surely, 2^91461511 is an apocalyptic number.

91461511 is a deficient number, since it is larger than the sum of its proper divisors (1).

91461511 is an equidigital number, since it uses as much as digits as its factorization.

91461511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 28.

The square root of 91461511 is about 9563.5511709825. The cubic root of 91461511 is about 450.5532471102.

The spelling of 91461511 in words is "ninety-one million, four hundred sixty-one thousand, five hundred eleven".