623809831 has 2 divisors, whose sum is σ = 623809832. Its totient is φ = 623809830.

The previous prime is 623809787. The next prime is 623809861. The reversal of 623809831 is 138908326.

623809831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623809831 - 2¹¹ = 623807783 is a prime.

It is a super-2 number, since 2×623809831² = 778277410504497122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623809861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311904915 + 311904916.

It is an arithmetic number, because the mean of its divisors is an integer number (311904916).

Almost surely, 2^623809831 is an apocalyptic number.

623809831 is a deficient number, since it is larger than the sum of its proper divisors (1).

623809831 is an equidigital number, since it uses as much as digits as its factorization.

623809831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 623809831 is about 24976.1852771795. The cubic root of 623809831 is about 854.4449190549. Note that the first 3 decimals are identical.

The spelling of 623809831 in words is "six hundred twenty-three million, eight hundred nine thousand, eight hundred thirty-one".