649622999 has 2 divisors, whose sum is σ = 649623000. Its totient is φ = 649622998.

The previous prime is 649622959. The next prime is 649623031. The reversal of 649622999 is 999226946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649622999 - 2¹² = 649618903 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649622959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324811499 + 324811500.

It is an arithmetic number, because the mean of its divisors is an integer number (324811500).

Almost surely, 2^649622999 is an apocalyptic number.

649622999 is a deficient number, since it is larger than the sum of its proper divisors (1).

649622999 is an equidigital number, since it uses as much as digits as its factorization.

649622999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 56.

The square root of 649622999 is about 25487.7028976720. The cubic root of 649622999 is about 866.0715996143.

The spelling of 649622999 in words is "six hundred forty-nine million, six hundred twenty-two thousand, nine hundred ninety-nine".