84991854 has 16 divisors (see below), whose sum is σ = 177374592. Its totient is φ = 27098808.

The previous prime is 84991853. The next prime is 84991859. The reversal of 84991854 is 45819948.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84991853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307804 + ... + 308079.

It is an arithmetic number, because the mean of its divisors is an integer number (11085912).

Almost surely, 2^84991854 is an apocalyptic number.

84991854 is an abundant number, since it is smaller than the sum of its proper divisors (92382738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84991854 is a wasteful number, since it uses less digits than its factorization.

84991854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615911.

The product of its digits is 414720, while the sum is 48.

The square root of 84991854 is about 9219.1026678305. The cubic root of 84991854 is about 439.6689210516.

The spelling of 84991854 in words is "eighty-four million, nine hundred ninety-one thousand, eight hundred fifty-four".