84374981 has 2 divisors, whose sum is σ = 84374982. Its totient is φ = 84374980.

The previous prime is 84374951. The next prime is 84374989. The reversal of 84374981 is 18947348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83356900 + 1018081 = 9130^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 84374981 - 2¹⁴ = 84358597 is a prime.

It is a super-3 number, since 3×84374981³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84374989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42187490 + 42187491.

It is an arithmetic number, because the mean of its divisors is an integer number (42187491).

Almost surely, 2^84374981 is an apocalyptic number.

It is an amenable number.

84374981 is a deficient number, since it is larger than the sum of its proper divisors (1).

84374981 is an equidigital number, since it uses as much as digits as its factorization.

84374981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 84374981 is about 9185.5855012079. The cubic root of 84374981 is about 438.6026278097.

The spelling of 84374981 in words is "eighty-four million, three hundred seventy-four thousand, nine hundred eighty-one".