91286501 has 2 divisors, whose sum is σ = 91286502. Its totient is φ = 91286500.

The previous prime is 91286483. The next prime is 91286513. The reversal of 91286501 is 10568219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78676900 + 12609601 = 8870^2 + 3551^2 .

It is an emirp because it is prime and its reverse (10568219) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91286501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91286521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45643250 + 45643251.

It is an arithmetic number, because the mean of its divisors is an integer number (45643251).

Almost surely, 2^91286501 is an apocalyptic number.

It is an amenable number.

91286501 is a deficient number, since it is larger than the sum of its proper divisors (1).

91286501 is an equidigital number, since it uses as much as digits as its factorization.

91286501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 91286501 is about 9554.3969459092. The cubic root of 91286501 is about 450.2656883693.

The spelling of 91286501 in words is "ninety-one million, two hundred eighty-six thousand, five hundred one".