27431429 has 4 divisors (see below), whose sum is σ = 27807276. Its totient is φ = 27055584.

The previous prime is 27431423. The next prime is 27431441. The reversal of 27431429 is 92413472.

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 23990404 + 3441025 = 4898^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 27431429 - 2²⁴ = 10654213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27431395 and 27431404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27431423) 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, 187814 + ... + 187959.

It is an arithmetic number, because the mean of its divisors is an integer number (6951819).

Almost surely, 2^27431429 is an apocalyptic number.

It is an amenable number.

27431429 is a deficient number, since it is larger than the sum of its proper divisors (375847).

27431429 is an equidigital number, since it uses as much as digits as its factorization.

27431429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375846.

The product of its digits is 12096, while the sum is 32.

The square root of 27431429 is about 5237.5021718373. The cubic root of 27431429 is about 301.5894491509.

The spelling of 27431429 in words is "twenty-seven million, four hundred thirty-one thousand, four hundred twenty-nine".