91023432019 has 16 divisors (see below), whose sum is σ = 98616268800. Its totient is φ = 83515877280.

The previous prime is 91023432001. The next prime is 91023432037.

91023432019 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (91023432001) and next prime (91023432037).

It is a cyclic number.

It is not a de Polignac number, because 91023432019 - 2²⁷ = 90889214291 is a prime.

It is a super-2 number, since 2×91023432019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91023432089) 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 15 ways as a sum of consecutive naturals, for example, 2650134 + ... + 2684260.

It is an arithmetic number, because the mean of its divisors is an integer number (6163516800).

Almost surely, 2^91023432019 is an apocalyptic number.

91023432019 is a deficient number, since it is larger than the sum of its proper divisors (7592836781).

91023432019 is a wasteful number, since it uses less digits than its factorization.

91023432019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35370.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 91023432019 in words is "ninety-one billion, twenty-three million, four hundred thirty-two thousand, nineteen".