91698461 has 2 divisors, whose sum is σ = 91698462. Its totient is φ = 91698460.

The previous prime is 91698419. The next prime is 91698487. The reversal of 91698461 is 16489619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54671236 + 37027225 = 7394^2 + 6085^2 .

It is an emirp because it is prime and its reverse (16489619) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91698461 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91698491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45849230 + 45849231.

It is an arithmetic number, because the mean of its divisors is an integer number (45849231).

Almost surely, 2^91698461 is an apocalyptic number.

It is an amenable number.

91698461 is a deficient number, since it is larger than the sum of its proper divisors (1).

91698461 is an equidigital number, since it uses as much as digits as its factorization.

91698461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 91698461 is about 9575.9313385174. The cubic root of 91698461 is about 450.9419954474.

The spelling of 91698461 in words is "ninety-one million, six hundred ninety-eight thousand, four hundred sixty-one".