1623123647 has 2 divisors, whose sum is σ = 1623123648. Its totient is φ = 1623123646.

The previous prime is 1623123643. The next prime is 1623123653. The reversal of 1623123647 is 7463213261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1623123647 - 2² = 1623123643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1623123643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811561823 + 811561824.

It is an arithmetic number, because the mean of its divisors is an integer number (811561824).

Almost surely, 2^1623123647 is an apocalyptic number.

1623123647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623123647 is an equidigital number, since it uses as much as digits as its factorization.

1623123647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 1623123647 is about 40288.0087246813. The cubic root of 1623123647 is about 1175.2146635416.

The spelling of 1623123647 in words is "one billion, six hundred twenty-three million, one hundred twenty-three thousand, six hundred forty-seven".