84409855 has 8 divisors (see below), whose sum is σ = 101349072. Its totient is φ = 67489728.

The previous prime is 84409847. The next prime is 84409861. The reversal of 84409855 is 55890448.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84409855 - 2³ = 84409847 is a prime.

It is a super-2 number, since 2×84409855² = 14250047242242050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8139 + ... + 15331.

It is an arithmetic number, because the mean of its divisors is an integer number (12668634).

Almost surely, 2^84409855 is an apocalyptic number.

84409855 is a deficient number, since it is larger than the sum of its proper divisors (16939217).

84409855 is a wasteful number, since it uses less digits than its factorization.

84409855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9545.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 84409855 is about 9187.4836054275. The cubic root of 84409855 is about 438.6630474624.

It can be divided in two parts, 84409 and 855, that added together give a square (85264 = 292²).

The spelling of 84409855 in words is "eighty-four million, four hundred nine thousand, eight hundred fifty-five".