84870271 has 2 divisors, whose sum is σ = 84870272. Its totient is φ = 84870270.

The previous prime is 84870259. The next prime is 84870293. The reversal of 84870271 is 17207848.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84870271 is a prime.

It is a super-2 number, since 2×84870271² = 14405925799226882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84870271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84870241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42435135 + 42435136.

It is an arithmetic number, because the mean of its divisors is an integer number (42435136).

Almost surely, 2^84870271 is an apocalyptic number.

84870271 is a deficient number, since it is larger than the sum of its proper divisors (1).

84870271 is an equidigital number, since it uses as much as digits as its factorization.

84870271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 84870271 is about 9212.5062279490. The cubic root of 84870271 is about 439.4591684915.

The spelling of 84870271 in words is "eighty-four million, eight hundred seventy thousand, two hundred seventy-one".