623394853 has 2 divisors, whose sum is σ = 623394854. Its totient is φ = 623394852.

The previous prime is 623394803. The next prime is 623394859. The reversal of 623394853 is 358493326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444450724 + 178944129 = 21082^2 + 13377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623394853 is a prime.

It is a super-2 number, since 2×623394853² = 777242285493783218, which contains 22 as substring.

It is equal to p_32480989 and since 623394853 and 32480989 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623394859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311697426 + 311697427.

It is an arithmetic number, because the mean of its divisors is an integer number (311697427).

Almost surely, 2^623394853 is an apocalyptic number.

It is an amenable number.

623394853 is a deficient number, since it is larger than the sum of its proper divisors (1).

623394853 is an equidigital number, since it uses as much as digits as its factorization.

623394853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 43.

The square root of 623394853 is about 24967.8764215141. The cubic root of 623394853 is about 854.2554091113.

The spelling of 623394853 in words is "six hundred twenty-three million, three hundred ninety-four thousand, eight hundred fifty-three".