1623123629 has 2 divisors, whose sum is σ = 1623123630. Its totient is φ = 1623123628.

The previous prime is 1623123611. The next prime is 1623123643. The reversal of 1623123629 is 9263213261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1339706404 + 283417225 = 36602^2 + 16835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1623123629 - 2²⁸ = 1354688173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1623125629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811561814 + 811561815.

It is an arithmetic number, because the mean of its divisors is an integer number (811561815).

Almost surely, 2^1623123629 is an apocalyptic number.

It is an amenable number.

1623123629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623123629 is an equidigital number, since it uses as much as digits as its factorization.

1623123629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 1623123629 is about 40288.0085012898. The cubic root of 1623123629 is about 1175.2146591974.

The spelling of 1623123629 in words is "one billion, six hundred twenty-three million, one hundred twenty-three thousand, six hundred twenty-nine".