649455059 has 4 divisors (see below), whose sum is σ = 708496440. Its totient is φ = 590413680.

The previous prime is 649455049. The next prime is 649455073. The reversal of 649455059 is 950554946.

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 649455059 - 2⁸ = 649454803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649455049) 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, 29520674 + ... + 29520695.

It is an arithmetic number, because the mean of its divisors is an integer number (177124110).

Almost surely, 2^649455059 is an apocalyptic number.

649455059 is a deficient number, since it is larger than the sum of its proper divisors (59041381).

649455059 is a wasteful number, since it uses less digits than its factorization.

649455059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59041380.

The product of its (nonzero) digits is 972000, while the sum is 47.

The square root of 649455059 is about 25484.4081547914. The cubic root of 649455059 is about 865.9969611444.

The spelling of 649455059 in words is "six hundred forty-nine million, four hundred fifty-five thousand, fifty-nine".