1623630403 has 2 divisors, whose sum is σ = 1623630404. Its totient is φ = 1623630402.

The previous prime is 1623630391. The next prime is 1623630521. The reversal of 1623630403 is 3040363261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1623630403 - 2¹⁷ = 1623499331 is a prime.

It is not a weakly prime, because it can be changed into another prime (1623636403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811815201 + 811815202.

It is an arithmetic number, because the mean of its divisors is an integer number (811815202).

Almost surely, 2^1623630403 is an apocalyptic number.

1623630403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623630403 is an equidigital number, since it uses as much as digits as its factorization.

1623630403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 1623630403 is about 40294.2974005007. The cubic root of 1623630403 is about 1175.3369555423.

Adding to 1623630403 its reverse (3040363261), we get a palindrome (4663993664).

The spelling of 1623630403 in words is "one billion, six hundred twenty-three million, six hundred thirty thousand, four hundred three".