431679889 has 4 divisors (see below), whose sum is σ = 431921380. Its totient is φ = 431438400.

The previous prime is 431679887. The next prime is 431679917. The reversal of 431679889 is 988976134.

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 224550225 + 207129664 = 14985^2 + 14392^2 .

It is a cyclic number.

It is not a de Polignac number, because 431679889 - 2¹ = 431679887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431679883) 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, 118044 + ... + 121645.

It is an arithmetic number, because the mean of its divisors is an integer number (107980345).

Almost surely, 2^431679889 is an apocalyptic number.

It is an amenable number.

431679889 is a deficient number, since it is larger than the sum of its proper divisors (241491).

431679889 is a wasteful number, since it uses less digits than its factorization.

431679889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241490.

The product of its digits is 2612736, while the sum is 55.

The square root of 431679889 is about 20776.9075899182. The cubic root of 431679889 is about 755.7658640820.

The spelling of 431679889 in words is "four hundred thirty-one million, six hundred seventy-nine thousand, eight hundred eighty-nine".