91502261 has 2 divisors, whose sum is σ = 91502262. Its totient is φ = 91502260.

The previous prime is 91502251. The next prime is 91502267. The reversal of 91502261 is 16220519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89889361 + 1612900 = 9481^2 + 1270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91502261 is a prime.

It is a super-2 number, since 2×91502261² = 16745327536224242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91502261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91502267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45751130 + 45751131.

It is an arithmetic number, because the mean of its divisors is an integer number (45751131).

Almost surely, 2^91502261 is an apocalyptic number.

It is an amenable number.

91502261 is a deficient number, since it is larger than the sum of its proper divisors (1).

91502261 is an equidigital number, since it uses as much as digits as its factorization.

91502261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 91502261 is about 9565.6814184877. The cubic root of 91502261 is about 450.6201507311.

It can be divided in two parts, 9150 and 2261, that added together give a palindrome (11411).

The spelling of 91502261 in words is "ninety-one million, five hundred two thousand, two hundred sixty-one".