852787381 has 6 divisors (see below), whose sum is σ = 866999382. Its totient is φ = 838582920.

The previous prime is 852787373. The next prime is 852787391. The reversal of 852787381 is 183787258.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 503284356 + 349503025 = 22434^2 + 18695^2 .

It is not a de Polignac number, because 852787381 - 2³ = 852787373 is a prime.

It is a super-2 number, since 2×852787381² = 1454492634385678322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852787301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226210 + ... + 229948.

It is an arithmetic number, because the mean of its divisors is an integer number (144499897).

Almost surely, 2^852787381 is an apocalyptic number.

It is an amenable number.

852787381 is a deficient number, since it is larger than the sum of its proper divisors (14212001).

852787381 is an frugal number, since it uses more digits than its factorization.

852787381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7539 (or 3800 counting only the distinct ones).

The product of its digits is 752640, while the sum is 49.

The square root of 852787381 is about 29202.5235382150. The cubic root of 852787381 is about 948.3025573974.

The spelling of 852787381 in words is "eight hundred fifty-two million, seven hundred eighty-seven thousand, three hundred eighty-one".