87437389 has 6 divisors (see below), whose sum is σ = 94680906. Its totient is φ = 80711280.

The previous prime is 87437381. The next prime is 87437393. The reversal of 87437389 is 98373478.

It can be written as a sum of positive squares in 3 ways, for example, as 3861225 + 83576164 = 1965^2 + 9142^2 .

It is not a de Polignac number, because 87437389 - 2³ = 87437381 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 (87437381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258522 + ... + 258859.

It is an arithmetic number, because the mean of its divisors is an integer number (15780151).

Almost surely, 2^87437389 is an apocalyptic number.

It is an amenable number.

87437389 is a deficient number, since it is larger than the sum of its proper divisors (7243517).

87437389 is a wasteful number, since it uses less digits than its factorization.

87437389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517407 (or 517394 counting only the distinct ones).

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

The square root of 87437389 is about 9350.7961693109. The cubic root of 87437389 is about 443.8460850188.

The spelling of 87437389 in words is "eighty-seven million, four hundred thirty-seven thousand, three hundred eighty-nine".