920549 has 4 divisors (see below), whose sum is σ = 1052064. Its totient is φ = 789036.

The previous prime is 920539. The next prime is 920561. The reversal of 920549 is 945029.

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, and also an emirpimes, since its reverse is a distinct semiprime: 945029 = 47 ⋅20107.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920549 is a prime.

It is a super-2 number, since 2×920549² = 1694820922802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920509) 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 3 ways as a sum of consecutive naturals, for example, 65747 + ... + 65760.

It is an arithmetic number, because the mean of its divisors is an integer number (263016).

2⁹²⁰⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

920549 is a deficient number, since it is larger than the sum of its proper divisors (131515).

920549 is a wasteful number, since it uses less digits than its factorization.

920549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131514.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 920549 is about 959.4524480140. The cubic root of 920549 is about 97.2782248353.

The spelling of 920549 in words is "nine hundred twenty thousand, five hundred forty-nine".