623349787 has 2 divisors, whose sum is σ = 623349788. Its totient is φ = 623349786.

The previous prime is 623349743. The next prime is 623349799. The reversal of 623349787 is 787943326.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623349787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623349787.

It is not a weakly prime, because it can be changed into another prime (623349707) 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, 311674893 + 311674894.

It is an arithmetic number, because the mean of its divisors is an integer number (311674894).

Almost surely, 2^623349787 is an apocalyptic number.

623349787 is a deficient number, since it is larger than the sum of its proper divisors (1).

623349787 is an equidigital number, since it uses as much as digits as its factorization.

623349787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 49.

The square root of 623349787 is about 24966.9739255682. The cubic root of 623349787 is about 854.2348235484.

The spelling of 623349787 in words is "six hundred twenty-three million, three hundred forty-nine thousand, seven hundred eighty-seven".