91091461 has 2 divisors, whose sum is σ = 91091462. Its totient is φ = 91091460.

The previous prime is 91091401. The next prime is 91091479. The reversal of 91091461 is 16419019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63202500 + 27888961 = 7950^2 + 5281^2 .

It is an emirp because it is prime and its reverse (16419019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91091461 - 2⁷ = 91091333 is a prime.

It is a super-2 number, since 2×91091461² = 16595308534229042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91091401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45545730 + 45545731.

It is an arithmetic number, because the mean of its divisors is an integer number (45545731).

Almost surely, 2^91091461 is an apocalyptic number.

It is an amenable number.

91091461 is a deficient number, since it is larger than the sum of its proper divisors (1).

91091461 is an equidigital number, since it uses as much as digits as its factorization.

91091461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 91091461 is about 9544.1846692109. The cubic root of 91091461 is about 449.9447849949.

The spelling of 91091461 in words is "ninety-one million, ninety-one thousand, four hundred sixty-one".