84190681 has 16 divisors (see below), whose sum is σ = 91108800. Its totient is φ = 77511168.

The previous prime is 84190679. The next prime is 84190697. The reversal of 84190681 is 18609148.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 84190681 - 2¹ = 84190679 is a prime.

It is a super-2 number, since 2×84190681² = 14176141534487522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84190681.

It is not an unprimeable number, because it can be changed into a prime (84190621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221950 + ... + 222328.

It is an arithmetic number, because the mean of its divisors is an integer number (5694300).

Almost surely, 2^84190681 is an apocalyptic number.

It is an amenable number.

84190681 is a deficient number, since it is larger than the sum of its proper divisors (6918119).

84190681 is a wasteful number, since it uses less digits than its factorization.

84190681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 84190681 is about 9175.5479945342. The cubic root of 84190681 is about 438.2830489078.

The spelling of 84190681 in words is "eighty-four million, one hundred ninety thousand, six hundred eighty-one".