113187926989 has 2 divisors, whose sum is σ = 113187926990. Its totient is φ = 113187926988.

The previous prime is 113187926849. The next prime is 113187926993. The reversal of 113187926989 is 989629781311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90787716100 + 22400210889 = 301310^2 + 149667^2 .

It is a cyclic number.

It is not a de Polignac number, because 113187926989 - 2²¹ = 113185829837 is a prime.

It is a super-2 number, since 2×113187926989² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 113187926989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113187926689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56593963494 + 56593963495.

It is an arithmetic number, because the mean of its divisors is an integer number (56593963495).

Almost surely, 2^113187926989 is an apocalyptic number.

It is an amenable number.

113187926989 is a deficient number, since it is larger than the sum of its proper divisors (1).

113187926989 is an equidigital number, since it uses as much as digits as its factorization.

113187926989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 64.

The spelling of 113187926989 in words is "one hundred thirteen billion, one hundred eighty-seven million, nine hundred twenty-six thousand, nine hundred eighty-nine".