647914699 has 2 divisors, whose sum is σ = 647914700. Its totient is φ = 647914698.

The previous prime is 647914691. The next prime is 647914717. The reversal of 647914699 is 996419746.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647914699 - 2³ = 647914691 is a prime.

It is not a weakly prime, because it can be changed into another prime (647914691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323957349 + 323957350.

It is an arithmetic number, because the mean of its divisors is an integer number (323957350).

Almost surely, 2^647914699 is an apocalyptic number.

647914699 is a deficient number, since it is larger than the sum of its proper divisors (1).

647914699 is an equidigital number, since it uses as much as digits as its factorization.

647914699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 647914699 is about 25454.1685976973. The cubic root of 647914699 is about 865.3117697372.

The spelling of 647914699 in words is "six hundred forty-seven million, nine hundred fourteen thousand, six hundred ninety-nine".