87021338 has 4 divisors (see below), whose sum is σ = 130532010. Its totient is φ = 43510668.

The previous prime is 87021331. The next prime is 87021353. The reversal of 87021338 is 83312078.

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

It can be written as a sum of positive squares in only one way, i.e., 71284249 + 15737089 = 8443^2 + 3967^2 .

It is not an unprimeable number, because it can be changed into a prime (87021331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21755333 + ... + 21755336.

Almost surely, 2^87021338 is an apocalyptic number.

87021338 is a deficient number, since it is larger than the sum of its proper divisors (43510672).

87021338 is a wasteful number, since it uses less digits than its factorization.

87021338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43510671.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 87021338 is about 9328.5228198252. The cubic root of 87021338 is about 443.1409851446.

The spelling of 87021338 in words is "eighty-seven million, twenty-one thousand, three hundred thirty-eight".