526420813 has 2 divisors, whose sum is σ = 526420814. Its totient is φ = 526420812.

The previous prime is 526420801. The next prime is 526420819. The reversal of 526420813 is 318024625.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365689129 + 160731684 = 19123^2 + 12678^2 .

It is a cyclic number.

It is not a de Polignac number, because 526420813 - 2²¹ = 524323661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (526420819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263210406 + 263210407.

It is an arithmetic number, because the mean of its divisors is an integer number (263210407).

Almost surely, 2^526420813 is an apocalyptic number.

It is an amenable number.

526420813 is a deficient number, since it is larger than the sum of its proper divisors (1).

526420813 is an equidigital number, since it uses as much as digits as its factorization.

526420813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 526420813 is about 22943.8622075709. The cubic root of 526420813 is about 807.4414073088.

The spelling of 526420813 in words is "five hundred twenty-six million, four hundred twenty thousand, eight hundred thirteen".