623429029 has 2 divisors, whose sum is σ = 623429030. Its totient is φ = 623429028.

The previous prime is 623428999. The next prime is 623429033. The reversal of 623429029 is 920924326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377252929 + 246176100 = 19423^2 + 15690^2 .

It is a cyclic number.

It is not a de Polignac number, because 623429029 - 2⁵ = 623428997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623423029) 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, 311714514 + 311714515.

It is an arithmetic number, because the mean of its divisors is an integer number (311714515).

Almost surely, 2^623429029 is an apocalyptic number.

It is an amenable number.

623429029 is a deficient number, since it is larger than the sum of its proper divisors (1).

623429029 is an equidigital number, since it uses as much as digits as its factorization.

623429029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 623429029 is about 24968.5608115486. The cubic root of 623429029 is about 854.2710196024.

The spelling of 623429029 in words is "six hundred twenty-three million, four hundred twenty-nine thousand, twenty-nine".