2651123923 has 4 divisors (see below), whose sum is σ = 3029855920. Its totient is φ = 2272391928.

The previous prime is 2651123899. The next prime is 2651123927. The reversal of 2651123923 is 3293211562.

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 2651123923 - 2⁹ = 2651123411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2651123927) 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, 189365988 + ... + 189366001.

It is an arithmetic number, because the mean of its divisors is an integer number (757463980).

Almost surely, 2^2651123923 is an apocalyptic number.

2651123923 is a deficient number, since it is larger than the sum of its proper divisors (378731997).

2651123923 is an equidigital number, since it uses as much as digits as its factorization.

2651123923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378731996.

The product of its digits is 19440, while the sum is 34.

The square root of 2651123923 is about 51489.0660529010. The cubic root of 2651123923 is about 1384.0231131703.

The spelling of 2651123923 in words is "two billion, six hundred fifty-one million, one hundred twenty-three thousand, nine hundred twenty-three".