123912961919 has 8 divisors (see below), whose sum is σ = 125344434960. Its totient is φ = 122482360000.

The previous prime is 123912961877. The next prime is 123912961943. The reversal of 123912961919 is 919169219321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123912961919 is a prime.

It is a super-2 number, since 2×123912961919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123912961519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70544 + ... + 502794.

It is an arithmetic number, because the mean of its divisors is an integer number (15668054370).

Almost surely, 2^123912961919 is an apocalyptic number.

123912961919 is a deficient number, since it is larger than the sum of its proper divisors (1431473041).

123912961919 is an equidigital number, since it uses as much as digits as its factorization.

123912961919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435561.

The product of its digits is 472392, while the sum is 53.

The spelling of 123912961919 in words is "one hundred twenty-three billion, nine hundred twelve million, nine hundred sixty-one thousand, nine hundred nineteen".