87389743 has 4 divisors (see below), whose sum is σ = 99874000. Its totient is φ = 74905488.

The previous prime is 87389693. The next prime is 87389747. The reversal of 87389743 is 34798378.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 87389743 - 2²¹ = 85292591 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 (87389747) 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, 6242118 + ... + 6242131.

It is an arithmetic number, because the mean of its divisors is an integer number (24968500).

Almost surely, 2^87389743 is an apocalyptic number.

87389743 is a deficient number, since it is larger than the sum of its proper divisors (12484257).

87389743 is a wasteful number, since it uses less digits than its factorization.

87389743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12484256.

The product of its digits is 1016064, while the sum is 49.

The square root of 87389743 is about 9348.2481246488. The cubic root of 87389743 is about 443.7654508143.

It can be divided in two parts, 8738 and 9743, that added together give a palindrome (18481).

The spelling of 87389743 in words is "eighty-seven million, three hundred eighty-nine thousand, seven hundred forty-three".