126673989923 has 4 divisors (see below), whose sum is σ = 136418143008. Its totient is φ = 116929836840.

The previous prime is 126673989901. The next prime is 126673989947. The reversal of 126673989923 is 329989376621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329989376621 = 41 ⋅8048521381.

It is a cyclic number.

It is not a de Polignac number, because 126673989923 - 2¹⁶ = 126673924387 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 126673989923.

It is not an unprimeable number, because it can be changed into a prime (126673989983) 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, 4872076523 + ... + 4872076548.

It is an arithmetic number, because the mean of its divisors is an integer number (34104535752).

Almost surely, 2^126673989923 is an apocalyptic number.

126673989923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

126673989923 is a deficient number, since it is larger than the sum of its proper divisors (9744153085).

126673989923 is an equidigital number, since it uses as much as digits as its factorization.

126673989923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9744153084.

The product of its digits is 52907904, while the sum is 65.

The spelling of 126673989923 in words is "one hundred twenty-six billion, six hundred seventy-three million, nine hundred eighty-nine thousand, nine hundred twenty-three".