939490861 has 4 divisors (see below), whose sum is σ = 950810112. Its totient is φ = 928171612.

The previous prime is 939490847. The next prime is 939490883. The reversal of 939490861 is 168094939.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 939490861 - 2⁷ = 939490733 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 (939490841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5659501 + ... + 5659666.

It is an arithmetic number, because the mean of its divisors is an integer number (237702528).

Almost surely, 2^939490861 is an apocalyptic number.

It is an amenable number.

939490861 is a deficient number, since it is larger than the sum of its proper divisors (11319251).

939490861 is a wasteful number, since it uses less digits than its factorization.

939490861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11319250.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 939490861 is about 30651.1151673149. The cubic root of 939490861 is about 979.4092166711.

The spelling of 939490861 in words is "nine hundred thirty-nine million, four hundred ninety thousand, eight hundred sixty-one".