648787037 has 4 divisors (see below), whose sum is σ = 650455260. Its totient is φ = 647118816.

The previous prime is 648787019. The next prime is 648787039. The reversal of 648787037 is 730787846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 730787846 = 2 ⋅365393923.

It can be written as a sum of positive squares in 2 ways, for example, as 53963716 + 594823321 = 7346^2 + 24389^2 .

It is a cyclic number.

It is not a de Polignac number, because 648787037 - 2⁶ = 648786973 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 (648787039) 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, 833528 + ... + 834305.

It is an arithmetic number, because the mean of its divisors is an integer number (162613815).

Almost surely, 2^648787037 is an apocalyptic number.

It is an amenable number.

648787037 is a deficient number, since it is larger than the sum of its proper divisors (1668223).

648787037 is a wasteful number, since it uses less digits than its factorization.

648787037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668222.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The square root of 648787037 is about 25471.2982982808. The cubic root of 648787037 is about 865.6999411144.

The spelling of 648787037 in words is "six hundred forty-eight million, seven hundred eighty-seven thousand, thirty-seven".