91923393585409 has 8 divisors (see below), whose sum is σ = 92319657578280. Its totient is φ = 91527252230400.

The previous prime is 91923393585377. The next prime is 91923393585421. The reversal of 91923393585409 is 90458539332919.

It can be written as a sum of positive squares in 4 ways, for example, as 1203540643600 + 90719852941809 = 1097060^2 + 9524697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91923393585409 - 2⁵ = 91923393585377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91923393585209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29156974 + ... + 32155495.

It is an arithmetic number, because the mean of its divisors is an integer number (11539957197285).

Almost surely, 2^{91923393585409} is an apocalyptic number.

It is an amenable number.

91923393585409 is a deficient number, since it is larger than the sum of its proper divisors (396263992871).

91923393585409 is a wasteful number, since it uses less digits than its factorization.

91923393585409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61318931.

The product of its (nonzero) digits is 283435200, while the sum is 70.

The spelling of 91923393585409 in words is "ninety-one trillion, nine hundred twenty-three billion, three hundred ninety-three million, five hundred eighty-five thousand, four hundred nine".