1634423 has 4 divisors (see below), whose sum is σ = 1867920. Its totient is φ = 1400928.

The previous prime is 1634417. The next prime is 1634441. The reversal of 1634423 is 3244361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1634423 - 2⁴ = 1634407 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1634443) 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, 116738 + ... + 116751.

It is an arithmetic number, because the mean of its divisors is an integer number (466980).

2^1634423 is an apocalyptic number.

1634423 is a deficient number, since it is larger than the sum of its proper divisors (233497).

1634423 is an equidigital number, since it uses as much as digits as its factorization.

1634423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233496.

The product of its digits is 1728, while the sum is 23.

The square root of 1634423 is about 1278.4455404905. The cubic root of 1634423 is about 117.7935439978.

Adding to 1634423 its reverse (3244361), we get a palindrome (4878784).

The spelling of 1634423 in words is "one million, six hundred thirty-four thousand, four hundred twenty-three".