649489699 has 2 divisors, whose sum is σ = 649489700. Its totient is φ = 649489698.

The previous prime is 649489667. The next prime is 649489739. The reversal of 649489699 is 996984946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649489699 - 2⁵ = 649489667 is a prime.

It is a super-2 number, since 2×649489699² = 843673738214221202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 649489699.

It is not a weakly prime, because it can be changed into another prime (649489619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324744849 + 324744850.

It is an arithmetic number, because the mean of its divisors is an integer number (324744850).

Almost surely, 2^649489699 is an apocalyptic number.

649489699 is a deficient number, since it is larger than the sum of its proper divisors (1).

649489699 is an equidigital number, since it uses as much as digits as its factorization.

649489699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30233088, while the sum is 64.

The square root of 649489699 is about 25485.0877769726. The cubic root of 649489699 is about 866.0123574375.

It can be divided in two parts, 64948 and 9699, that added together give a palindrome (74647).

The spelling of 649489699 in words is "six hundred forty-nine million, four hundred eighty-nine thousand, six hundred ninety-nine".