84989651 has 2 divisors, whose sum is σ = 84989652. Its totient is φ = 84989650.

The previous prime is 84989621. The next prime is 84989657. The reversal of 84989651 is 15698948.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84989651 - 2²² = 80795347 is a prime.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 84989651.

It is not a weakly prime, because it can be changed into another prime (84989657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42494825 + 42494826.

It is an arithmetic number, because the mean of its divisors is an integer number (42494826).

Almost surely, 2^84989651 is an apocalyptic number.

84989651 is a deficient number, since it is larger than the sum of its proper divisors (1).

84989651 is an equidigital number, since it uses as much as digits as its factorization.

84989651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 50.

The square root of 84989651 is about 9218.9831868813. The cubic root of 84989651 is about 439.6651222601.

The spelling of 84989651 in words is "eighty-four million, nine hundred eighty-nine thousand, six hundred fifty-one".