623994901 has 2 divisors, whose sum is σ = 623994902. Its totient is φ = 623994900.

The previous prime is 623994893. The next prime is 623994977. The reversal of 623994901 is 109499326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 454968900 + 169026001 = 21330^2 + 13001^2 .

It is a cyclic number.

It is not a de Polignac number, because 623994901 - 2³ = 623994893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623994001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311997450 + 311997451.

It is an arithmetic number, because the mean of its divisors is an integer number (311997451).

Almost surely, 2^623994901 is an apocalyptic number.

It is an amenable number.

623994901 is a deficient number, since it is larger than the sum of its proper divisors (1).

623994901 is an equidigital number, since it uses as much as digits as its factorization.

623994901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 623994901 is about 24979.8899317031. The cubic root of 623994901 is about 854.5294087385.

The spelling of 623994901 in words is "six hundred twenty-three million, nine hundred ninety-four thousand, nine hundred one".