84423155 has 4 divisors (see below), whose sum is σ = 101307792. Its totient is φ = 67538520.

The previous prime is 84423151. The next prime is 84423161. The reversal of 84423155 is 55132448.

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

It is not a de Polignac number, because 84423155 - 2² = 84423151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84423151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8442311 + ... + 8442320.

It is an arithmetic number, because the mean of its divisors is an integer number (25326948).

Almost surely, 2^84423155 is an apocalyptic number.

84423155 is a deficient number, since it is larger than the sum of its proper divisors (16884637).

84423155 is a wasteful number, since it uses less digits than its factorization.

84423155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16884636.

The product of its digits is 19200, while the sum is 32.

The square root of 84423155 is about 9188.2073877335. The cubic root of 84423155 is about 438.6860854996.

The spelling of 84423155 in words is "eighty-four million, four hundred twenty-three thousand, one hundred fifty-five".