91642024597 has 2 divisors, whose sum is σ = 91642024598. Its totient is φ = 91642024596.

The previous prime is 91642024561. The next prime is 91642024603. The reversal of 91642024597 is 79542024619.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60717395281 + 30924629316 = 246409^2 + 175854^2 .

It is a cyclic number.

It is not a de Polignac number, because 91642024597 - 2¹⁵ = 91641991829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91642024597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91642022597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45821012298 + 45821012299.

It is an arithmetic number, because the mean of its divisors is an integer number (45821012299).

Almost surely, 2^91642024597 is an apocalyptic number.

It is an amenable number.

91642024597 is a deficient number, since it is larger than the sum of its proper divisors (1).

91642024597 is an equidigital number, since it uses as much as digits as its factorization.

91642024597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 91642024597 in words is "ninety-one billion, six hundred forty-two million, twenty-four thousand, five hundred ninety-seven".