423692189 has 4 divisors (see below), whose sum is σ = 424749180. Its totient is φ = 422635200.

The previous prime is 423692183. The next prime is 423692209. The reversal of 423692189 is 981296324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 385808164 + 37884025 = 19642^2 + 6155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423692189 is a prime.

It is a super-2 number, since 2×423692189² = 359030142039223442, 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 (423692183) 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, 527894 + ... + 528695.

It is an arithmetic number, because the mean of its divisors is an integer number (106187295).

Almost surely, 2^423692189 is an apocalyptic number.

It is an amenable number.

423692189 is a deficient number, since it is larger than the sum of its proper divisors (1056991).

423692189 is a wasteful number, since it uses less digits than its factorization.

423692189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056990.

The product of its digits is 186624, while the sum is 44.

The square root of 423692189 is about 20583.7846131366. The cubic root of 423692189 is about 751.0753102810.

The spelling of 423692189 in words is "four hundred twenty-three million, six hundred ninety-two thousand, one hundred eighty-nine".