649026437 has 4 divisors (see below), whose sum is σ = 649185996. Its totient is φ = 648866880.

The previous prime is 649026421. The next prime is 649026449. The reversal of 649026437 is 734620946.

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 603881476 + 45144961 = 24574^2 + 6719^2 .

It is a cyclic number.

It is not a de Polignac number, because 649026437 - 2⁴ = 649026421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649026394 and 649026403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649026457) 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, 73514 + ... + 81867.

It is an arithmetic number, because the mean of its divisors is an integer number (162296499).

Almost surely, 2^649026437 is an apocalyptic number.

It is an amenable number.

649026437 is a deficient number, since it is larger than the sum of its proper divisors (159559).

649026437 is a wasteful number, since it uses less digits than its factorization.

649026437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159558.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 649026437 is about 25475.9972719421. The cubic root of 649026437 is about 865.8064080381.

The spelling of 649026437 in words is "six hundred forty-nine million, twenty-six thousand, four hundred thirty-seven".