852666949 has 2 divisors, whose sum is σ = 852666950. Its totient is φ = 852666948.

The previous prime is 852666901. The next prime is 852666973. The reversal of 852666949 is 949666258.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672624225 + 180042724 = 25935^2 + 13418^2 .

It is a cyclic number.

It is not a de Polignac number, because 852666949 - 2⁷ = 852666821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 852666949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (852664949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426333474 + 426333475.

It is an arithmetic number, because the mean of its divisors is an integer number (426333475).

Almost surely, 2^852666949 is an apocalyptic number.

It is an amenable number.

852666949 is a deficient number, since it is larger than the sum of its proper divisors (1).

852666949 is an equidigital number, since it uses as much as digits as its factorization.

852666949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 55.

The square root of 852666949 is about 29200.4614518333. The cubic root of 852666949 is about 948.2579150271.

The spelling of 852666949 in words is "eight hundred fifty-two million, six hundred sixty-six thousand, nine hundred forty-nine".