649437 has 8 divisors (see below), whose sum is σ = 878400. Its totient is φ = 426720.

The previous prime is 649427. The next prime is 649457. The reversal of 649437 is 734946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 649437 - 2⁴ = 649421 is a prime.

It is a d-powerful number, because it can be written as 6 + 4 + 4⁴ + 9² + 3¹² + 7⁶ .

649437 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 649398 and 649407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1312 + ... + 1737.

It is an arithmetic number, because the mean of its divisors is an integer number (109800).

2⁶⁴⁹⁴³⁷ is an apocalyptic number.

It is an amenable number.

649437 is a deficient number, since it is larger than the sum of its proper divisors (228963).

649437 is a wasteful number, since it uses less digits than its factorization.

649437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123.

The product of its digits is 18144, while the sum is 33.

The square root of 649437 is about 805.8765414131. The cubic root of 649437 is about 86.5988934321.

The spelling of 649437 in words is "six hundred forty-nine thousand, four hundred thirty-seven".