84680981 has 16 divisors (see below), whose sum is σ = 107827200. Its totient is φ = 64578480.

The previous prime is 84680971. The next prime is 84680983. The reversal of 84680981 is 18908648.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 84680981 - 2²⁶ = 17572117 is a prime.

It is a super-2 number, since 2×84680981² = 14341737086244722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84680983) 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, 8081 + ... + 15318.

It is an arithmetic number, because the mean of its divisors is an integer number (6739200).

Almost surely, 2^84680981 is an apocalyptic number.

It is an amenable number.

84680981 is a deficient number, since it is larger than the sum of its proper divisors (23146219).

84680981 is a wasteful number, since it uses less digits than its factorization.

84680981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23464.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 84680981 is about 9202.2269587312. The cubic root of 84680981 is about 439.1322100812.

The spelling of 84680981 in words is "eighty-four million, six hundred eighty thousand, nine hundred eighty-one".