649137 has 4 divisors (see below), whose sum is σ = 865520. Its totient is φ = 432756.

The previous prime is 649123. The next prime is 649141. The reversal of 649137 is 731946.

It is a happy number.

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 not a de Polignac number, because 649137 - 2⁶ = 649073 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108187 + ... + 108192.

It is an arithmetic number, because the mean of its divisors is an integer number (216380).

2⁶⁴⁹¹³⁷ is an apocalyptic number.

It is an amenable number.

649137 is a deficient number, since it is larger than the sum of its proper divisors (216383).

649137 is a wasteful number, since it uses less digits than its factorization.

649137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216382.

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

The square root of 649137 is about 805.6903871836. The cubic root of 649137 is about 86.5855569219.

The spelling of 649137 in words is "six hundred forty-nine thousand, one hundred thirty-seven".