649907519 has 8 divisors (see below), whose sum is σ = 653599872. Its totient is φ = 646225560.

The previous prime is 649907509. The next prime is 649907551. The reversal of 649907519 is 915709946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649907519 is a prime.

It is a super-2 number, since 2×649907519² = 844759566505470722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649907509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145814 + ... + 150204.

It is an arithmetic number, because the mean of its divisors is an integer number (81699984).

Almost surely, 2^649907519 is an apocalyptic number.

649907519 is a deficient number, since it is larger than the sum of its proper divisors (3692353).

649907519 is a wasteful number, since it uses less digits than its factorization.

649907519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 649907519 is about 25493.2838018173. The cubic root of 649907519 is about 866.1980210033.

The spelling of 649907519 in words is "six hundred forty-nine million, nine hundred seven thousand, five hundred nineteen".