649629059 has 4 divisors (see below), whose sum is σ = 649702704. Its totient is φ = 649555416.

The previous prime is 649629037. The next prime is 649629061. The reversal of 649629059 is 950926946.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 649629059 - 2²⁰ = 648580483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649628998 and 649629016.

It is not an unprimeable number, because it can be changed into a prime (649629259) 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, 21452 + ... + 41945.

It is an arithmetic number, because the mean of its divisors is an integer number (162425676).

Almost surely, 2^649629059 is an apocalyptic number.

649629059 is a deficient number, since it is larger than the sum of its proper divisors (73645).

649629059 is a wasteful number, since it uses less digits than its factorization.

649629059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73644.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 649629059 is about 25487.8217782532. The cubic root of 649629059 is about 866.0742926519.

The spelling of 649629059 in words is "six hundred forty-nine million, six hundred twenty-nine thousand, fifty-nine".