654949 has 4 divisors (see below), whose sum is σ = 689440. Its totient is φ = 620460.

The previous prime is 654943. The next prime is 654967. The reversal of 654949 is 949456.

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 654949 - 2⁵ = 654917 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

654949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17217 + ... + 17254.

It is an arithmetic number, because the mean of its divisors is an integer number (172360).

2⁶⁵⁴⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

654949 is a deficient number, since it is larger than the sum of its proper divisors (34491).

654949 is a wasteful number, since it uses less digits than its factorization.

654949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34490.

The product of its digits is 38880, while the sum is 37.

The square root of 654949 is about 809.2891942934. The cubic root of 654949 is about 86.8432019645.

The spelling of 654949 in words is "six hundred fifty-four thousand, nine hundred forty-nine".