84890061 has 12 divisors (see below), whose sum is σ = 129832092. Its totient is φ = 53264256.

The previous prime is 84890053. The next prime is 84890077. The reversal of 84890061 is 16009848.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 41409225 + 43480836 = 6435^2 + 6594^2 .

It is not a de Polignac number, because 84890061 - 2³ = 84890053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84889998 and 84890025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84890261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277266 + ... + 277571.

It is an arithmetic number, because the mean of its divisors is an integer number (10819341).

Almost surely, 2^84890061 is an apocalyptic number.

It is an amenable number.

84890061 is a deficient number, since it is larger than the sum of its proper divisors (44942031).

84890061 is a wasteful number, since it uses less digits than its factorization.

84890061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554860 (or 554857 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 84890061 is about 9213.5802487415. The cubic root of 84890061 is about 439.4933234473.

It can be divided in two parts, 848 and 90061, that added together give a palindrome (90909).

The spelling of 84890061 in words is "eighty-four million, eight hundred ninety thousand, sixty-one".