649834807 has 2 divisors, whose sum is σ = 649834808. Its totient is φ = 649834806.

The previous prime is 649834777. The next prime is 649834817. The reversal of 649834807 is 708438946.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649834807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649834817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324917403 + 324917404.

It is an arithmetic number, because the mean of its divisors is an integer number (324917404).

Almost surely, 2^649834807 is an apocalyptic number.

649834807 is a deficient number, since it is larger than the sum of its proper divisors (1).

649834807 is an equidigital number, since it uses as much as digits as its factorization.

649834807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 649834807 is about 25491.8576608297. The cubic root of 649834807 is about 866.1657162329.

The spelling of 649834807 in words is "six hundred forty-nine million, eight hundred thirty-four thousand, eight hundred seven".