87331449 has 4 divisors (see below), whose sum is σ = 116441936. Its totient is φ = 58220964.

The previous prime is 87331421. The next prime is 87331451. The reversal of 87331449 is 94413378.

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 de Polignac number, because none of the positive numbers 2^k-87331449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87331459) 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 3 ways as a sum of consecutive naturals, for example, 14555239 + ... + 14555244.

It is an arithmetic number, because the mean of its divisors is an integer number (29110484).

Almost surely, 2^87331449 is an apocalyptic number.

It is an amenable number.

87331449 is a deficient number, since it is larger than the sum of its proper divisors (29110487).

87331449 is a wasteful number, since it uses less digits than its factorization.

87331449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29110486.

The product of its digits is 72576, while the sum is 39.

The square root of 87331449 is about 9345.1296941241. The cubic root of 87331449 is about 443.6667564807. Note that the first 3 decimals are identical.

The spelling of 87331449 in words is "eighty-seven million, three hundred thirty-one thousand, four hundred forty-nine".