123977914831 has 4 divisors (see below), whose sum is σ = 125370925200. Its totient is φ = 122584904464.

The previous prime is 123977914729. The next prime is 123977914883. The reversal of 123977914831 is 138419779321.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123977914831 is a prime.

It is a super-3 number, since 3×123977914831³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123977912831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696505051 + ... + 696505228.

It is an arithmetic number, because the mean of its divisors is an integer number (31342731300).

Almost surely, 2^123977914831 is an apocalyptic number.

123977914831 is a deficient number, since it is larger than the sum of its proper divisors (1393010369).

123977914831 is an equidigital number, since it uses as much as digits as its factorization.

123977914831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393010368.

The product of its digits is 2286144, while the sum is 55.

The spelling of 123977914831 in words is "one hundred twenty-three billion, nine hundred seventy-seven million, nine hundred fourteen thousand, eight hundred thirty-one".