12437190091 has 4 divisors (see below), whose sum is σ = 12607562632. Its totient is φ = 12266817552.

The previous prime is 12437190013. The next prime is 12437190109. The reversal of 12437190091 is 19009173421.

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 12437190091 - 2¹⁵ = 12437157323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12437190091.

It is not an unprimeable number, because it can be changed into a prime (12437190691) 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, 85186161 + ... + 85186306.

It is an arithmetic number, because the mean of its divisors is an integer number (3151890658).

Almost surely, 2^12437190091 is an apocalyptic number.

12437190091 is a deficient number, since it is larger than the sum of its proper divisors (170372541).

12437190091 is an equidigital number, since it uses as much as digits as its factorization.

12437190091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170372540.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 12437190091 in words is "twelve billion, four hundred thirty-seven million, one hundred ninety thousand, ninety-one".