263539013 has 2 divisors, whose sum is σ = 263539014. Its totient is φ = 263539012.

The previous prime is 263538983. The next prime is 263539019. The reversal of 263539013 is 310935362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252396769 + 11142244 = 15887^2 + 3338^2 .

It is a cyclic number.

It is not a de Polignac number, because 263539013 - 2⁸ = 263538757 is a prime.

It is a super-2 number, since 2×263539013² = 138905622746028338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263539019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131769506 + 131769507.

It is an arithmetic number, because the mean of its divisors is an integer number (131769507).

Almost surely, 2^263539013 is an apocalyptic number.

It is an amenable number.

263539013 is a deficient number, since it is larger than the sum of its proper divisors (1).

263539013 is an equidigital number, since it uses as much as digits as its factorization.

263539013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 32.

The square root of 263539013 is about 16233.8847168507. The cubic root of 263539013 is about 641.1332566285.

The spelling of 263539013 in words is "two hundred sixty-three million, five hundred thirty-nine thousand, thirteen".