84149691 has 8 divisors (see below), whose sum is σ = 112242240. Its totient is φ = 56078472.

The previous prime is 84149641. The next prime is 84149699. The reversal of 84149691 is 19694148.

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

It is not a de Polignac number, because 84149691 - 2¹¹ = 84147643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84149699) 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 7 ways as a sum of consecutive naturals, for example, 11200 + ... + 17138.

It is an arithmetic number, because the mean of its divisors is an integer number (14030280).

Almost surely, 2^84149691 is an apocalyptic number.

84149691 is a deficient number, since it is larger than the sum of its proper divisors (28092549).

84149691 is a wasteful number, since it uses less digits than its factorization.

84149691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10665.

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

The square root of 84149691 is about 9173.3140685360. The cubic root of 84149691 is about 438.2119082608.

The spelling of 84149691 in words is "eighty-four million, one hundred forty-nine thousand, six hundred ninety-one".