649816967 has 6 divisors (see below), whose sum is σ = 685818288. Its totient is φ = 615615732.

The previous prime is 649816943. The next prime is 649816991. The reversal of 649816967 is 769618946.

It is an interprime number because it is at equal distance from previous prime (649816943) and next prime (649816991).

It is not a de Polignac number, because 649816967 - 2¹² = 649812871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649816927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 899663 + ... + 900384.

It is an arithmetic number, because the mean of its divisors is an integer number (114303048).

Almost surely, 2^649816967 is an apocalyptic number.

649816967 is a deficient number, since it is larger than the sum of its proper divisors (36001321).

649816967 is a wasteful number, since it uses less digits than its factorization.

649816967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800085 (or 1800066 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The square root of 649816967 is about 25491.5077427758. The cubic root of 649816967 is about 866.1577898401.

The spelling of 649816967 in words is "six hundred forty-nine million, eight hundred sixteen thousand, nine hundred sixty-seven".