1623990479 has 2 divisors, whose sum is σ = 1623990480. Its totient is φ = 1623990478.

The previous prime is 1623990451. The next prime is 1623990481. The reversal of 1623990479 is 9740993261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1623990479 - 2²⁸ = 1355555023 is a prime.

Together with 1623990481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1623990419) 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, 811995239 + 811995240.

It is an arithmetic number, because the mean of its divisors is an integer number (811995240).

Almost surely, 2^1623990479 is an apocalyptic number.

1623990479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623990479 is an equidigital number, since it uses as much as digits as its factorization.

1623990479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 1623990479 is about 40298.7652292226. The cubic root of 1623990479 is about 1175.4238347867.

The spelling of 1623990479 in words is "one billion, six hundred twenty-three million, nine hundred ninety thousand, four hundred seventy-nine".