649834739 has 2 divisors, whose sum is σ = 649834740. Its totient is φ = 649834738.

The previous prime is 649834729. The next prime is 649834753. The reversal of 649834739 is 937438946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649834739 - 2⁴ = 649834723 is a prime.

It is a super-2 number, since 2×649834739² = 844570376022396242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (649834729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324917369 + 324917370.

It is an arithmetic number, because the mean of its divisors is an integer number (324917370).

Almost surely, 2^649834739 is an apocalyptic number.

649834739 is a deficient number, since it is larger than the sum of its proper divisors (1).

649834739 is an equidigital number, since it uses as much as digits as its factorization.

649834739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 53.

The square root of 649834739 is about 25491.8563270704. The cubic root of 649834739 is about 866.1656860205.

The spelling of 649834739 in words is "six hundred forty-nine million, eight hundred thirty-four thousand, seven hundred thirty-nine".