649958783 has 8 divisors (see below), whose sum is σ = 684783600. Its totient is φ = 615195648.

The previous prime is 649958753. The next prime is 649958791. The reversal of 649958783 is 387859946.

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

It is a cyclic number.

It is not a de Polignac number, because 649958783 - 2¹⁶ = 649893247 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 (649958713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7073 + ... + 36741.

It is an arithmetic number, because the mean of its divisors is an integer number (85597950).

Almost surely, 2^649958783 is an apocalyptic number.

649958783 is a deficient number, since it is larger than the sum of its proper divisors (34824817).

649958783 is a wasteful number, since it uses less digits than its factorization.

649958783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30841.

The product of its digits is 13063680, while the sum is 59.

The square root of 649958783 is about 25494.2892232751. The cubic root of 649958783 is about 866.2207953245.

The spelling of 649958783 in words is "six hundred forty-nine million, nine hundred fifty-eight thousand, seven hundred eighty-three".