91402973243 has 4 divisors (see below), whose sum is σ = 91473884520. Its totient is φ = 91332061968.

The previous prime is 91402973237. The next prime is 91402973293. The reversal of 91402973243 is 34237920419.

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

It is a cyclic number.

It is not a de Polignac number, because 91402973243 - 2²⁶ = 91335864379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91402973194 and 91402973203.

It is not an unprimeable number, because it can be changed into a prime (91402973293) 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, 35453705 + ... + 35456282.

It is an arithmetic number, because the mean of its divisors is an integer number (22868471130).

Almost surely, 2^91402973243 is an apocalyptic number.

91402973243 is a deficient number, since it is larger than the sum of its proper divisors (70911277).

91402973243 is a wasteful number, since it uses less digits than its factorization.

91402973243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70911276.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 91402973243 in words is "ninety-one billion, four hundred two million, nine hundred seventy-three thousand, two hundred forty-three".