84842981 has 4 divisors (see below), whose sum is σ = 86912364. Its totient is φ = 82773600.

The previous prime is 84842969. The next prime is 84842987. The reversal of 84842981 is 18924848.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25090081 + 59752900 = 5009^2 + 7730^2 .

It is a cyclic number.

It is not a de Polignac number, because 84842981 - 2¹⁰ = 84841957 is a prime.

It is a super-2 number, since 2×84842981² = 14396662849932722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84842987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034630 + ... + 1034711.

It is an arithmetic number, because the mean of its divisors is an integer number (21728091).

Almost surely, 2^84842981 is an apocalyptic number.

It is an amenable number.

84842981 is a deficient number, since it is larger than the sum of its proper divisors (2069383).

84842981 is a wasteful number, since it uses less digits than its factorization.

84842981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069382.

The product of its digits is 147456, while the sum is 44.

The square root of 84842981 is about 9211.0249701105. The cubic root of 84842981 is about 439.4120608050.

The spelling of 84842981 in words is "eighty-four million, eight hundred forty-two thousand, nine hundred eighty-one".