84431249 has 4 divisors (see below), whose sum is σ = 96492864. Its totient is φ = 72369636.

The previous prime is 84431219. The next prime is 84431261. The reversal of 84431249 is 94213448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84431249 - 2¹² = 84427153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84431219) 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, 6030797 + ... + 6030810.

It is an arithmetic number, because the mean of its divisors is an integer number (24123216).

Almost surely, 2^84431249 is an apocalyptic number.

It is an amenable number.

84431249 is a deficient number, since it is larger than the sum of its proper divisors (12061615).

84431249 is a wasteful number, since it uses less digits than its factorization.

84431249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12061614.

The product of its digits is 27648, while the sum is 35.

The square root of 84431249 is about 9188.6478330601. The cubic root of 84431249 is about 438.7001046065.

The spelling of 84431249 in words is "eighty-four million, four hundred thirty-one thousand, two hundred forty-nine".