939252509 has 4 divisors (see below), whose sum is σ = 1011502716. Its totient is φ = 867002304.

The previous prime is 939252491. The next prime is 939252521. The reversal of 939252509 is 905252939.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 572644900 + 366607609 = 23930^2 + 19147^2 .

It is a cyclic number.

It is not a de Polignac number, because 939252509 - 2⁸ = 939252253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 939252509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939252599) 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, 36125084 + ... + 36125109.

It is an arithmetic number, because the mean of its divisors is an integer number (252875679).

Almost surely, 2^939252509 is an apocalyptic number.

It is an amenable number.

939252509 is a deficient number, since it is larger than the sum of its proper divisors (72250207).

939252509 is a wasteful number, since it uses less digits than its factorization.

939252509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72250206.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 939252509 is about 30647.2267750281. The cubic root of 939252509 is about 979.3263831919.

The spelling of 939252509 in words is "nine hundred thirty-nine million, two hundred fifty-two thousand, five hundred nine".