649801101 has 4 divisors (see below), whose sum is σ = 866401472. Its totient is φ = 433200732.

The previous prime is 649801093. The next prime is 649801123. The reversal of 649801101 is 101108946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 649801101 - 2³ = 649801093 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 (649801171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108300181 + ... + 108300186.

It is an arithmetic number, because the mean of its divisors is an integer number (216600368).

Almost surely, 2^649801101 is an apocalyptic number.

It is an amenable number.

649801101 is a deficient number, since it is larger than the sum of its proper divisors (216600371).

649801101 is a wasteful number, since it uses less digits than its factorization.

649801101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216600370.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 649801101 is about 25491.1965391976. The cubic root of 649801101 is about 866.1507403826.

The spelling of 649801101 in words is "six hundred forty-nine million, eight hundred one thousand, one hundred one".