91523297 has 2 divisors, whose sum is σ = 91523298. Its totient is φ = 91523296.

The previous prime is 91523287. The next prime is 91523303. The reversal of 91523297 is 79232519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78570496 + 12952801 = 8864^2 + 3599^2 .

It is an emirp because it is prime and its reverse (79232519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91523297 - 2¹⁰ = 91522273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91523297.

It is not a weakly prime, because it can be changed into another prime (91523227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45761648 + 45761649.

It is an arithmetic number, because the mean of its divisors is an integer number (45761649).

Almost surely, 2^91523297 is an apocalyptic number.

It is an amenable number.

91523297 is a deficient number, since it is larger than the sum of its proper divisors (1).

91523297 is an equidigital number, since it uses as much as digits as its factorization.

91523297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 91523297 is about 9566.7809110484. The cubic root of 91523297 is about 450.6546800024.

The spelling of 91523297 in words is "ninety-one million, five hundred twenty-three thousand, two hundred ninety-seven".