252689771 has 2 divisors, whose sum is σ = 252689772. Its totient is φ = 252689770.

The previous prime is 252689737. The next prime is 252689791. The reversal of 252689771 is 177986252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252689771 - 2¹⁴ = 252673387 is a prime.

It is a super-3 number, since 3×252689771³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (252689791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126344885 + 126344886.

It is an arithmetic number, because the mean of its divisors is an integer number (126344886).

Almost surely, 2^252689771 is an apocalyptic number.

252689771 is a deficient number, since it is larger than the sum of its proper divisors (1).

252689771 is an equidigital number, since it uses as much as digits as its factorization.

252689771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 47.

The square root of 252689771 is about 15896.2187642219. The cubic root of 252689771 is about 632.2117365576.

The spelling of 252689771 in words is "two hundred fifty-two million, six hundred eighty-nine thousand, seven hundred seventy-one".