84448391 has 4 divisors (see below), whose sum is σ = 84466800. Its totient is φ = 84429984.

The previous prime is 84448373. The next prime is 84448409. The reversal of 84448391 is 19384448.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (84448373) and next prime (84448409).

It is a cyclic number.

It is not a de Polignac number, because 84448391 - 2⁶ = 84448327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84448321) 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, 3830 + ... + 13548.

It is an arithmetic number, because the mean of its divisors is an integer number (21116700).

Almost surely, 2^84448391 is an apocalyptic number.

84448391 is a deficient number, since it is larger than the sum of its proper divisors (18409).

84448391 is an equidigital number, since it uses as much as digits as its factorization.

84448391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18408.

The product of its digits is 110592, while the sum is 41.

The square root of 84448391 is about 9189.5805671423. The cubic root of 84448391 is about 438.7297922257.

The spelling of 84448391 in words is "eighty-four million, four hundred forty-eight thousand, three hundred ninety-one".