2621979823 has 2 divisors, whose sum is σ = 2621979824. Its totient is φ = 2621979822.

The previous prime is 2621979821. The next prime is 2621979827. The reversal of 2621979823 is 3289791262.

2621979823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2621979823 - 2¹ = 2621979821 is a prime.

It is a super-2 number, since 2×2621979823² = 13749556384438222658, which contains 22 as substring.

Together with 2621979821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2621979821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310989911 + 1310989912.

It is an arithmetic number, because the mean of its divisors is an integer number (1310989912).

Almost surely, 2^2621979823 is an apocalyptic number.

2621979823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621979823 is an equidigital number, since it uses as much as digits as its factorization.

2621979823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 2621979823 is about 51205.2714376167. The cubic root of 2621979823 is about 1378.9328413970.

The spelling of 2621979823 in words is "two billion, six hundred twenty-one million, nine hundred seventy-nine thousand, eight hundred twenty-three".