91249163 has 2 divisors, whose sum is σ = 91249164. Its totient is φ = 91249162.

The previous prime is 91249111. The next prime is 91249181. The reversal of 91249163 is 36194219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91249163 - 2⁶ = 91249099 is a prime.

It is a super-3 number, since 3×91249163³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (91249463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45624581 + 45624582.

It is an arithmetic number, because the mean of its divisors is an integer number (45624582).

Almost surely, 2^91249163 is an apocalyptic number.

91249163 is a deficient number, since it is larger than the sum of its proper divisors (1).

91249163 is an equidigital number, since it uses as much as digits as its factorization.

91249163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 91249163 is about 9552.4427765886. The cubic root of 91249163 is about 450.2042907812.

The spelling of 91249163 in words is "ninety-one million, two hundred forty-nine thousand, one hundred sixty-three".