84340427 has 4 divisors (see below), whose sum is σ = 86619936. Its totient is φ = 82060920.

The previous prime is 84340423. The next prime is 84340447. The reversal of 84340427 is 72404348.

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 84340427 - 2² = 84340423 is a prime.

It is a super-2 number, since 2×84340427² = 14226615253084658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84340393 and 84340402.

It is not an unprimeable number, because it can be changed into a prime (84340423) 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, 1139699 + ... + 1139772.

It is an arithmetic number, because the mean of its divisors is an integer number (21654984).

Almost surely, 2^84340427 is an apocalyptic number.

84340427 is a deficient number, since it is larger than the sum of its proper divisors (2279509).

84340427 is a wasteful number, since it uses less digits than its factorization.

84340427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279508.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 84340427 is about 9183.7044268639. The cubic root of 84340427 is about 438.5427461387.

The spelling of 84340427 in words is "eighty-four million, three hundred forty thousand, four hundred twenty-seven".