649319441 has 4 divisors (see below), whose sum is σ = 659964084. Its totient is φ = 638674800.

The previous prime is 649319423. The next prime is 649319477. The reversal of 649319441 is 144913946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28313041 + 621006400 = 5321^2 + 24920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649319441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649318441) 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, 5322230 + ... + 5322351.

It is an arithmetic number, because the mean of its divisors is an integer number (164991021).

Almost surely, 2^649319441 is an apocalyptic number.

649319441 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

649319441 is a deficient number, since it is larger than the sum of its proper divisors (10644643).

649319441 is a wasteful number, since it uses less digits than its factorization.

649319441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10644642.

The product of its digits is 93312, while the sum is 41.

The square root of 649319441 is about 25481.7472124656. The cubic root of 649319441 is about 865.9366783221.

The spelling of 649319441 in words is "six hundred forty-nine million, three hundred nineteen thousand, four hundred forty-one".