84806818 has 4 divisors (see below), whose sum is σ = 127210230. Its totient is φ = 42403408.

The previous prime is 84806797. The next prime is 84806833. The reversal of 84806818 is 81860848.

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

It can be written as a sum of positive squares in only one way, i.e., 62932489 + 21874329 = 7933^2 + 4677^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21201703 + ... + 21201706.

Almost surely, 2^84806818 is an apocalyptic number.

84806818 is a deficient number, since it is larger than the sum of its proper divisors (42403412).

84806818 is a wasteful number, since it uses less digits than its factorization.

84806818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42403411.

The product of its (nonzero) digits is 98304, while the sum is 43.

The square root of 84806818 is about 9209.0617328803. The cubic root of 84806818 is about 439.3496210825.

The spelling of 84806818 in words is "eighty-four million, eight hundred six thousand, eight hundred eighteen".