84158491 has 6 divisors (see below), whose sum is σ = 84742476. Its totient is φ = 83578500.

The previous prime is 84158479. The next prime is 84158497. The reversal of 84158491 is 19485148.

It is not a de Polignac number, because 84158491 - 2¹³ = 84150299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84158497) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20956 + ... + 24646.

It is an arithmetic number, because the mean of its divisors is an integer number (14123746).

Almost surely, 2^84158491 is an apocalyptic number.

84158491 is a deficient number, since it is larger than the sum of its proper divisors (583985).

84158491 is an equidigital number, since it uses as much as digits as its factorization.

84158491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993 (or 3842 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 84158491 is about 9173.7937081668. The cubic root of 84158491 is about 438.2271831451.

The spelling of 84158491 in words is "eighty-four million, one hundred fifty-eight thousand, four hundred ninety-one".