84491331 has 4 divisors (see below), whose sum is σ = 112655112. Its totient is φ = 56327552.

The previous prime is 84491327. The next prime is 84491339. The reversal of 84491331 is 13319448.

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

It is a cyclic number.

It is not a de Polignac number, because 84491331 - 2² = 84491327 is a prime.

It is a super-2 number, since 2×84491331² = 14277570028303122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84491292 and 84491301.

It is not an unprimeable number, because it can be changed into a prime (84491339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14081886 + ... + 14081891.

It is an arithmetic number, because the mean of its divisors is an integer number (28163778).

Almost surely, 2^84491331 is an apocalyptic number.

84491331 is a deficient number, since it is larger than the sum of its proper divisors (28163781).

84491331 is a wasteful number, since it uses less digits than its factorization.

84491331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28163780.

The product of its digits is 10368, while the sum is 33.

The square root of 84491331 is about 9191.9166118933. The cubic root of 84491331 is about 438.8041408501.

The spelling of 84491331 in words is "eighty-four million, four hundred ninety-one thousand, three hundred thirty-one".