649883091 has 16 divisors (see below), whose sum is σ = 1017999360. Its totient is φ = 363570720.

The previous prime is 649883077. The next prime is 649883099. The reversal of 649883091 is 190388946.

It is not a de Polignac number, because 649883091 - 2¹⁰ = 649882067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649883091.

It is not an unprimeable number, because it can be changed into a prime (649883099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757011 + ... + 757868.

It is an arithmetic number, because the mean of its divisors is an integer number (63624960).

Almost surely, 2^649883091 is an apocalyptic number.

649883091 is a deficient number, since it is larger than the sum of its proper divisors (368116269).

649883091 is a wasteful number, since it uses less digits than its factorization.

649883091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514906.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 649883091 is about 25492.8046907358. The cubic root of 649883091 is about 866.1871683052.

The spelling of 649883091 in words is "six hundred forty-nine million, eight hundred eighty-three thousand, ninety-one".