623546969 has 2 divisors, whose sum is σ = 623546970. Its totient is φ = 623546968.

The previous prime is 623546953. The next prime is 623547007. The reversal of 623546969 is 969645326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 484000000 + 139546969 = 22000^2 + 11813^2 .

It is a cyclic number.

It is not a de Polignac number, because 623546969 - 2⁴ = 623546953 is a prime.

It is a super-2 number, since 2×623546969² = 777621645098173922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (623546929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311773484 + 311773485.

It is an arithmetic number, because the mean of its divisors is an integer number (311773485).

Almost surely, 2^623546969 is an apocalyptic number.

It is an amenable number.

623546969 is a deficient number, since it is larger than the sum of its proper divisors (1).

623546969 is an equidigital number, since it uses as much as digits as its factorization.

623546969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 50.

The square root of 623546969 is about 24970.9224699449. The cubic root of 623546969 is about 854.3248863975.

The spelling of 623546969 in words is "six hundred twenty-three million, five hundred forty-six thousand, nine hundred sixty-nine".