84400291 has 8 divisors (see below), whose sum is σ = 89474544. Its totient is φ = 79338240.

The previous prime is 84400247. The next prime is 84400319. The reversal of 84400291 is 19200448.

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

It is a cyclic number.

It is not a de Polignac number, because 84400291 - 2¹¹ = 84398243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84400691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13951 + ... + 19063.

It is an arithmetic number, because the mean of its divisors is an integer number (11184318).

Almost surely, 2^84400291 is an apocalyptic number.

84400291 is a deficient number, since it is larger than the sum of its proper divisors (5074253).

84400291 is a wasteful number, since it uses less digits than its factorization.

84400291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6101.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 84400291 is about 9186.9630999585. The cubic root of 84400291 is about 438.6464793660.

The spelling of 84400291 in words is "eighty-four million, four hundred thousand, two hundred ninety-one".