91423134142433 has 4 divisors (see below), whose sum is σ = 91441127285508. Its totient is φ = 91405140999360.

The previous prime is 91423134142429. The next prime is 91423134142441. The reversal of 91423134142433 is 33424143132419.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21266042926144 + 70157091216289 = 4611512^2 + 8375983^2 .

It is a cyclic number.

It is not a de Polignac number, because 91423134142433 - 2² = 91423134142429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91423134142453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8996563916 + ... + 8996574077.

It is an arithmetic number, because the mean of its divisors is an integer number (22860281821377).

Almost surely, 2^{91423134142433} is an apocalyptic number.

It is an amenable number.

91423134142433 is a deficient number, since it is larger than the sum of its proper divisors (17993143075).

91423134142433 is a wasteful number, since it uses less digits than its factorization.

91423134142433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17993143074.

The product of its digits is 746496, while the sum is 44.

The spelling of 91423134142433 in words is "ninety-one trillion, four hundred twenty-three billion, one hundred thirty-four million, one hundred forty-two thousand, four hundred thirty-three".