649371 has 8 divisors (see below), whose sum is σ = 870480. Its totient is φ = 430592.

The previous prime is 649361. The next prime is 649379. The reversal of 649371 is 173946.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 649371 - 2⁶ = 649307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (108810).

2⁶⁴⁹³⁷¹ is an apocalyptic number.

649371 is a deficient number, since it is larger than the sum of its proper divisors (221109).

649371 is a wasteful number, since it uses less digits than its factorization.

649371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165.

The product of its digits is 4536, while the sum is 30.

The square root of 649371 is about 805.8355911723. The cubic root of 649371 is about 86.5959597523.

The spelling of 649371 in words is "six hundred forty-nine thousand, three hundred seventy-one".