84611851 has 2 divisors, whose sum is σ = 84611852. Its totient is φ = 84611850.

The previous prime is 84611837. The next prime is 84611869. The reversal of 84611851 is 15811648.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84611851 - 2¹⁵ = 84579083 is a prime.

It is equal to p_4922539 and since 84611851 and 4922539 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (84611881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42305925 + 42305926.

It is an arithmetic number, because the mean of its divisors is an integer number (42305926).

Almost surely, 2^84611851 is an apocalyptic number.

84611851 is a deficient number, since it is larger than the sum of its proper divisors (1).

84611851 is an equidigital number, since it uses as much as digits as its factorization.

84611851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 34.

The square root of 84611851 is about 9198.4700358266. The cubic root of 84611851 is about 439.0126811785.

The spelling of 84611851 in words is "eighty-four million, six hundred eleven thousand, eight hundred fifty-one".