84170231 has 2 divisors, whose sum is σ = 84170232. Its totient is φ = 84170230.

The previous prime is 84170183. The next prime is 84170263. The reversal of 84170231 is 13207148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84170231 - 2¹⁴ = 84153847 is a prime.

It is a super-2 number, since 2×84170231² = 14169255573186722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84170231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84170431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42085115 + 42085116.

It is an arithmetic number, because the mean of its divisors is an integer number (42085116).

Almost surely, 2^84170231 is an apocalyptic number.

84170231 is a deficient number, since it is larger than the sum of its proper divisors (1).

84170231 is an equidigital number, since it uses as much as digits as its factorization.

84170231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 84170231 is about 9174.4335519965. The cubic root of 84170231 is about 438.2475595716.

Adding to 84170231 its reverse (13207148), we get a palindrome (97377379).

The spelling of 84170231 in words is "eighty-four million, one hundred seventy thousand, two hundred thirty-one".