124907719891 has 4 divisors (see below), whose sum is σ = 124909204032. Its totient is φ = 124906235752.

The previous prime is 124907719883. The next prime is 124907719927. The reversal of 124907719891 is 198917709421.

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 124907719891 - 2³ = 124907719883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124907719801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607720 + ... + 786853.

It is an arithmetic number, because the mean of its divisors is an integer number (31227301008).

Almost surely, 2^124907719891 is an apocalyptic number.

124907719891 is a deficient number, since it is larger than the sum of its proper divisors (1484141).

124907719891 is an equidigital number, since it uses as much as digits as its factorization.

124907719891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484140.

The product of its (nonzero) digits is 2286144, while the sum is 58.

The spelling of 124907719891 in words is "one hundred twenty-four billion, nine hundred seven million, seven hundred nineteen thousand, eight hundred ninety-one".