87061439 has 8 divisors (see below), whose sum is σ = 92749440. Its totient is φ = 81484056.

The previous prime is 87061433. The next prime is 87061453. The reversal of 87061439 is 93416078.

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 87061439 - 2¹² = 87057343 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 (87061433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26027 + ... + 29180.

It is an arithmetic number, because the mean of its divisors is an integer number (11593680).

Almost surely, 2^87061439 is an apocalyptic number.

87061439 is a deficient number, since it is larger than the sum of its proper divisors (5688001).

87061439 is a wasteful number, since it uses less digits than its factorization.

87061439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55309.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 87061439 is about 9330.6719479360. The cubic root of 87061439 is about 443.2090438074.

The spelling of 87061439 in words is "eighty-seven million, sixty-one thousand, four hundred thirty-nine".