526409881 has 2 divisors, whose sum is σ = 526409882. Its totient is φ = 526409880.

The previous prime is 526409869. The next prime is 526409887. The reversal of 526409881 is 188904625.

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., 524822281 + 1587600 = 22909^2 + 1260^2 .

It is a cyclic number.

It is not a de Polignac number, because 526409881 - 2²⁷ = 392192153 is a prime.

It is a super-2 number, since 2×526409881² = 554214725628868322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (526409887) 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 as a sum of consecutive naturals, namely, 263204940 + 263204941.

It is an arithmetic number, because the mean of its divisors is an integer number (263204941).

Almost surely, 2^526409881 is an apocalyptic number.

It is an amenable number.

526409881 is a deficient number, since it is larger than the sum of its proper divisors (1).

526409881 is an equidigital number, since it uses as much as digits as its factorization.

526409881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 526409881 is about 22943.6239726857. The cubic root of 526409881 is about 807.4358179841.

The spelling of 526409881 in words is "five hundred twenty-six million, four hundred nine thousand, eight hundred eighty-one".