1623465647 has 2 divisors, whose sum is σ = 1623465648. Its totient is φ = 1623465646.

The previous prime is 1623465607. The next prime is 1623465661. The reversal of 1623465647 is 7465643261.

It is a strong prime.

It is an emirp because it is prime and its reverse (7465643261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1623465647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1623465598 and 1623465607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1623465607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811732823 + 811732824.

It is an arithmetic number, because the mean of its divisors is an integer number (811732824).

Almost surely, 2^1623465647 is an apocalyptic number.

1623465647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623465647 is an equidigital number, since it uses as much as digits as its factorization.

1623465647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 44.

The square root of 1623465647 is about 40292.2529402365. The cubic root of 1623465647 is about 1175.2971988823.

The spelling of 1623465647 in words is "one billion, six hundred twenty-three million, four hundred sixty-five thousand, six hundred forty-seven".