649929437 has 4 divisors (see below), whose sum is σ = 650221440. Its totient is φ = 649637436.

The previous prime is 649929433. The next prime is 649929443. The reversal of 649929437 is 734929946.

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 a cyclic number.

It is not a de Polignac number, because 649929437 - 2² = 649929433 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 (649929433) 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, 142637 + ... + 147122.

It is an arithmetic number, because the mean of its divisors is an integer number (162555360).

Almost surely, 2^649929437 is an apocalyptic number.

It is an amenable number.

649929437 is a deficient number, since it is larger than the sum of its proper divisors (292003).

649929437 is a wasteful number, since it uses less digits than its factorization.

649929437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292002.

The product of its digits is 2939328, while the sum is 53.

The square root of 649929437 is about 25493.7136761202. The cubic root of 649929437 is about 866.2077583450.

The spelling of 649929437 in words is "six hundred forty-nine million, nine hundred twenty-nine thousand, four hundred thirty-seven".