91461899 has 2 divisors, whose sum is σ = 91461900. Its totient is φ = 91461898.

The previous prime is 91461893. The next prime is 91462061. The reversal of 91461899 is 99816419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91461899 - 2¹² = 91457803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91461893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45730949 + 45730950.

It is an arithmetic number, because the mean of its divisors is an integer number (45730950).

Almost surely, 2^91461899 is an apocalyptic number.

91461899 is a deficient number, since it is larger than the sum of its proper divisors (1).

91461899 is an equidigital number, since it uses as much as digits as its factorization.

91461899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 47.

The square root of 91461899 is about 9563.5714563128. The cubic root of 91461899 is about 450.5538842249.

The spelling of 91461899 in words is "ninety-one million, four hundred sixty-one thousand, eight hundred ninety-nine".