91292269 has 2 divisors, whose sum is σ = 91292270. Its totient is φ = 91292268.

The previous prime is 91292231. The next prime is 91292309. The reversal of 91292269 is 96229219.

It is an a-pointer prime, because the next prime (91292309) can be obtained adding 91292269 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78057225 + 13235044 = 8835^2 + 3638^2 .

It is a cyclic number.

It is not a de Polignac number, because 91292269 - 2⁷ = 91292141 is a prime.

It is a super-2 number, since 2×91292269² = 16668556758336722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91298269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45646134 + 45646135.

It is an arithmetic number, because the mean of its divisors is an integer number (45646135).

Almost surely, 2^91292269 is an apocalyptic number.

It is an amenable number.

91292269 is a deficient number, since it is larger than the sum of its proper divisors (1).

91292269 is an equidigital number, since it uses as much as digits as its factorization.

91292269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 91292269 is about 9554.6987916941. The cubic root of 91292269 is about 450.2751716180.

The spelling of 91292269 in words is "ninety-one million, two hundred ninety-two thousand, two hundred sixty-nine".