91698811 has 2 divisors, whose sum is σ = 91698812. Its totient is φ = 91698810.

The previous prime is 91698797. The next prime is 91698881. The reversal of 91698811 is 11889619.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91698811 - 2⁵ = 91698779 is a prime.

It is not a weakly prime, because it can be changed into another prime (91698881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45849405 + 45849406.

It is an arithmetic number, because the mean of its divisors is an integer number (45849406).

Almost surely, 2^91698811 is an apocalyptic number.

91698811 is a deficient number, since it is larger than the sum of its proper divisors (1).

91698811 is an equidigital number, since it uses as much as digits as its factorization.

91698811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 43.

The square root of 91698811 is about 9575.9496134848. The cubic root of 91698811 is about 450.9425691738.

The spelling of 91698811 in words is "ninety-one million, six hundred ninety-eight thousand, eight hundred eleven".