939889281 has 32 divisors (see below), whose sum is σ = 1319661568. Its totient is φ = 594397440.

The previous prime is 939889253. The next prime is 939889297. The reversal of 939889281 is 182988939.

It is not a de Polignac number, because 939889281 - 2⁹ = 939888769 is a prime.

It is a super-2 number, since 2×939889281² = 1766783721077393922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (939889211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 859371 + ... + 860463.

It is an arithmetic number, because the mean of its divisors is an integer number (41239424).

Almost surely, 2^939889281 is an apocalyptic number.

It is an amenable number.

939889281 is a deficient number, since it is larger than the sum of its proper divisors (379772287).

939889281 is a wasteful number, since it uses less digits than its factorization.

939889281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321.

The product of its digits is 2239488, while the sum is 57.

The square root of 939889281 is about 30657.6137525411. The cubic root of 939889281 is about 979.5476466400.

The spelling of 939889281 in words is "nine hundred thirty-nine million, eight hundred eighty-nine thousand, two hundred eighty-one".