91147324669 has 2 divisors, whose sum is σ = 91147324670. Its totient is φ = 91147324668.

The previous prime is 91147324663. The next prime is 91147324787. The reversal of 91147324669 is 96642374119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52103540644 + 39043784025 = 228262^2 + 197595^2 .

It is a cyclic number.

It is not a de Polignac number, because 91147324669 - 2²⁹ = 90610453757 is a prime.

It is a super-2 number, since 2×91147324669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91147324663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45573662334 + 45573662335.

It is an arithmetic number, because the mean of its divisors is an integer number (45573662335).

Almost surely, 2^91147324669 is an apocalyptic number.

It is an amenable number.

91147324669 is a deficient number, since it is larger than the sum of its proper divisors (1).

91147324669 is an equidigital number, since it uses as much as digits as its factorization.

91147324669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The spelling of 91147324669 in words is "ninety-one billion, one hundred forty-seven million, three hundred twenty-four thousand, six hundred sixty-nine".