1623330649 has 2 divisors, whose sum is σ = 1623330650. Its totient is φ = 1623330648.

The previous prime is 1623330623. The next prime is 1623330677. The reversal of 1623330649 is 9460333261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 926106624 + 697224025 = 30432^2 + 26405^2 .

It is an emirp because it is prime and its reverse (9460333261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1623330649 - 2⁵ = 1623330617 is a prime.

It is a super-2 number, since 2×1623330649² = 5270404791965522402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1623330619) 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, 811665324 + 811665325.

It is an arithmetic number, because the mean of its divisors is an integer number (811665325).

Almost surely, 2^1623330649 is an apocalyptic number.

It is an amenable number.

1623330649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623330649 is an equidigital number, since it uses as much as digits as its factorization.

1623330649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 1623330649 is about 40290.5776702196. The cubic root of 1623330649 is about 1175.2646210100.

The spelling of 1623330649 in words is "one billion, six hundred twenty-three million, three hundred thirty thousand, six hundred forty-nine".