84431427 has 4 divisors (see below), whose sum is σ = 112575240. Its totient is φ = 56287616.

The previous prime is 84431407. The next prime is 84431467. The reversal of 84431427 is 72413448.

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 84431427 - 2¹² = 84427331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84431407) 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, 14071902 + ... + 14071907.

It is an arithmetic number, because the mean of its divisors is an integer number (28143810).

Almost surely, 2^84431427 is an apocalyptic number.

84431427 is a deficient number, since it is larger than the sum of its proper divisors (28143813).

84431427 is a wasteful number, since it uses less digits than its factorization.

84431427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28143812.

The product of its digits is 21504, while the sum is 33.

The square root of 84431427 is about 9188.6575189197. The cubic root of 84431427 is about 438.7004128990.

It can be divided in two parts, 8443 and 1427, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 84431427 in words is "eighty-four million, four hundred thirty-one thousand, four hundred twenty-seven".