649303783 has 4 divisors (see below), whose sum is σ = 649449448. Its totient is φ = 649158120.

The previous prime is 649303747. The next prime is 649303799. The reversal of 649303783 is 387303946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 649303783 - 2²⁹ = 112432871 is a prime.

It is a super-2 number, since 2×649303783² = 843190805236222178, 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 (649303723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65928 + ... + 75133.

It is an arithmetic number, because the mean of its divisors is an integer number (162362362).

Almost surely, 2^649303783 is an apocalyptic number.

649303783 is a deficient number, since it is larger than the sum of its proper divisors (145665).

649303783 is a wasteful number, since it uses less digits than its factorization.

649303783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145664.

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 649303783 is about 25481.4399710848. The cubic root of 649303783 is about 865.9297177289.

The spelling of 649303783 in words is "six hundred forty-nine million, three hundred three thousand, seven hundred eighty-three".