84078231 has 8 divisors (see below), whose sum is σ = 115720704. Its totient is φ = 54243960.

The previous prime is 84078229. The next prime is 84078251. The reversal of 84078231 is 13287048.

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

It is not a de Polignac number, because 84078231 - 2¹ = 84078229 is a prime.

It is a super-2 number, since 2×84078231² = 14138297856178722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 84078192 and 84078201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84078251) 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, 451941 + ... + 452126.

It is an arithmetic number, because the mean of its divisors is an integer number (14465088).

Almost surely, 2^84078231 is an apocalyptic number.

84078231 is a deficient number, since it is larger than the sum of its proper divisors (31642473).

84078231 is a wasteful number, since it uses less digits than its factorization.

84078231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904101.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 84078231 is about 9169.4182476316. The cubic root of 84078231 is about 438.0878298045.

The spelling of 84078231 in words is "eighty-four million, seventy-eight thousand, two hundred thirty-one".