84169491 has 16 divisors (see below), whose sum is σ = 128798208. Its totient is φ = 47894400.

The previous prime is 84169483. The next prime is 84169507. The reversal of 84169491 is 19496148.

It is not a de Polignac number, because 84169491 - 2³ = 84169483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84169391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3255 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (8049888).

Almost surely, 2^84169491 is an apocalyptic number.

84169491 is a deficient number, since it is larger than the sum of its proper divisors (44628717).

84169491 is a wasteful number, since it uses less digits than its factorization.

84169491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16882.

The product of its digits is 62208, while the sum is 42.

The square root of 84169491 is about 9174.3932224426. The cubic root of 84169491 is about 438.2462752531.

The spelling of 84169491 in words is "eighty-four million, one hundred sixty-nine thousand, four hundred ninety-one".