623497669 has 2 divisors, whose sum is σ = 623497670. Its totient is φ = 623497668.

The previous prime is 623497649. The next prime is 623497681. The reversal of 623497669 is 966794326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332624644 + 290873025 = 18238^2 + 17055^2 .

It is a cyclic number.

It is not a de Polignac number, because 623497669 - 2⁹ = 623497157 is a prime.

It is a super-2 number, since 2×623497669² = 777498686496867122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623497649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311748834 + 311748835.

It is an arithmetic number, because the mean of its divisors is an integer number (311748835).

Almost surely, 2^623497669 is an apocalyptic number.

It is an amenable number.

623497669 is a deficient number, since it is larger than the sum of its proper divisors (1).

623497669 is an equidigital number, since it uses as much as digits as its factorization.

623497669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 52.

The square root of 623497669 is about 24969.9353022790. The cubic root of 623497669 is about 854.3023704102.

The spelling of 623497669 in words is "six hundred twenty-three million, four hundred ninety-seven thousand, six hundred sixty-nine".