623436601 has 2 divisors, whose sum is σ = 623436602. Its totient is φ = 623436600.

The previous prime is 623436599. The next prime is 623436613. The reversal of 623436601 is 106634326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552203001 + 71233600 = 23499^2 + 8440^2 .

It is a cyclic number.

It is not a de Polignac number, because 623436601 - 2¹ = 623436599 is a prime.

Together with 623436599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (623436001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311718300 + 311718301.

It is an arithmetic number, because the mean of its divisors is an integer number (311718301).

Almost surely, 2^623436601 is an apocalyptic number.

It is an amenable number.

623436601 is a deficient number, since it is larger than the sum of its proper divisors (1).

623436601 is an equidigital number, since it uses as much as digits as its factorization.

623436601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 623436601 is about 24968.7124417740. The cubic root of 623436601 is about 854.2744781698.

The spelling of 623436601 in words is "six hundred twenty-three million, four hundred thirty-six thousand, six hundred one".