263372489 has 2 divisors, whose sum is σ = 263372490. Its totient is φ = 263372488.

The previous prime is 263372477. The next prime is 263372507. The reversal of 263372489 is 984273362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263088400 + 284089 = 16220^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 263372489 - 2¹² = 263368393 is a prime.

It is not a weakly prime, because it can be changed into another prime (263372419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131686244 + 131686245.

It is an arithmetic number, because the mean of its divisors is an integer number (131686245).

Almost surely, 2^263372489 is an apocalyptic number.

It is an amenable number.

263372489 is a deficient number, since it is larger than the sum of its proper divisors (1).

263372489 is an equidigital number, since it uses as much as digits as its factorization.

263372489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 44.

The square root of 263372489 is about 16228.7550046207. The cubic root of 263372489 is about 640.9981892516.

The spelling of 263372489 in words is "two hundred sixty-three million, three hundred seventy-two thousand, four hundred eighty-nine".