649130895 has 32 divisors (see below), whose sum is σ = 1318871040. Its totient is φ = 296745120.

The previous prime is 649130893. The next prime is 649130897. The reversal of 649130895 is 598031946.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (649130893) and next prime (649130897).

It is not a de Polignac number, because 649130895 - 2¹ = 649130893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 649130895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649130891) 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 31 ways as a sum of consecutive naturals, for example, 342511 + ... + 344400.

It is an arithmetic number, because the mean of its divisors is an integer number (41214720).

Almost surely, 2^649130895 is an apocalyptic number.

649130895 is an abundant number, since it is smaller than the sum of its proper divisors (669740145).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649130895 is a wasteful number, since it uses less digits than its factorization.

649130895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686932 (or 686926 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 649130895 is about 25478.0473152869. The cubic root of 649130895 is about 865.8528548128.

The spelling of 649130895 in words is "six hundred forty-nine million, one hundred thirty thousand, eight hundred ninety-five".