920409 has 16 divisors (see below), whose sum is σ = 1438080. Its totient is φ = 512640.

The previous prime is 920407. The next prime is 920411. The reversal of 920409 is 904029.

920409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (920407) and next prime (920411).

It is not a de Polignac number, because 920409 - 2¹ = 920407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (920407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327 + ... + 1395.

It is an arithmetic number, because the mean of its divisors is an integer number (89880).

2⁹²⁰⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

920409 is a deficient number, since it is larger than the sum of its proper divisors (517671).

920409 is a wasteful number, since it uses less digits than its factorization.

920409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 920409 is about 959.3794869602. The cubic root of 920409 is about 97.2732931254.

The spelling of 920409 in words is "nine hundred twenty thousand, four hundred nine".