1904923 has 4 divisors (see below), whose sum is σ = 1970640. Its totient is φ = 1839208.

The previous prime is 1904897. The next prime is 1904939. The reversal of 1904923 is 3294091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3294091 = 31 ⋅106261.

It is a cyclic number.

It is not a de Polignac number, because 1904923 - 2⁵ = 1904891 is a prime.

It is a Duffinian number.

1904923 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1904891 and 1904900.

It is not an unprimeable number, because it can be changed into a prime (1904963) 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, 32815 + ... + 32872.

It is an arithmetic number, because the mean of its divisors is an integer number (492660).

2^1904923 is an apocalyptic number.

1904923 is a deficient number, since it is larger than the sum of its proper divisors (65717).

1904923 is an equidigital number, since it uses as much as digits as its factorization.

1904923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65716.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1904923 is about 1380.1894797454. The cubic root of 1904923 is about 123.9631133780.

The spelling of 1904923 in words is "one million, nine hundred four thousand, nine hundred twenty-three".