2621670823 has 2 divisors, whose sum is σ = 2621670824. Its totient is φ = 2621670822.

The previous prime is 2621670809. The next prime is 2621670829. The reversal of 2621670823 is 3280761262.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2621670823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2621670829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310835411 + 1310835412.

It is an arithmetic number, because the mean of its divisors is an integer number (1310835412).

Almost surely, 2^2621670823 is an apocalyptic number.

2621670823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621670823 is an equidigital number, since it uses as much as digits as its factorization.

2621670823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 2621670823 is about 51202.2540812414. The cubic root of 2621670823 is about 1378.8786702470.

The spelling of 2621670823 in words is "two billion, six hundred twenty-one million, six hundred seventy thousand, eight hundred twenty-three".