84528981 has 32 divisors (see below), whose sum is σ = 134812800. Its totient is φ = 52151040.

The previous prime is 84528959. The next prime is 84529007. The reversal of 84528981 is 18982548.

84528981 = T₃₁₄₅ + T₃₁₄₆ + ... + T₃₁₆₁.

It is a happy number.

It is not a de Polignac number, because 84528981 - 2⁵ = 84528949 is a prime.

It is a super-2 number, since 2×84528981² = 14290297257796722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84528901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26490 + ... + 29508.

It is an arithmetic number, because the mean of its divisors is an integer number (4212900).

Almost surely, 2^84528981 is an apocalyptic number.

It is an amenable number.

84528981 is a deficient number, since it is larger than the sum of its proper divisors (50283819).

84528981 is a wasteful number, since it uses less digits than its factorization.

84528981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106 (or 3100 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 84528981 is about 9193.9643788738. The cubic root of 84528981 is about 438.8693093605.

The spelling of 84528981 in words is "eighty-four million, five hundred twenty-eight thousand, nine hundred eighty-one".