91020384001 has 2 divisors, whose sum is σ = 91020384002. Its totient is φ = 91020384000.

The previous prime is 91020383963. The next prime is 91020384019. The reversal of 91020384001 is 10048302019.

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., 85161246976 + 5859137025 = 291824^2 + 76545^2 .

It is a cyclic number.

It is not a de Polignac number, because 91020384001 - 2²⁵ = 90986829569 is a prime.

It is not a weakly prime, because it can be changed into another prime (91020384401) 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, 45510192000 + 45510192001.

It is an arithmetic number, because the mean of its divisors is an integer number (45510192001).

Almost surely, 2^91020384001 is an apocalyptic number.

It is an amenable number.

91020384001 is a deficient number, since it is larger than the sum of its proper divisors (1).

91020384001 is an equidigital number, since it uses as much as digits as its factorization.

91020384001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 91020384001 in words is "ninety-one billion, twenty million, three hundred eighty-four thousand, one".