263954939 has 2 divisors, whose sum is σ = 263954940. Its totient is φ = 263954938.

The previous prime is 263954921. The next prime is 263954947. The reversal of 263954939 is 939459362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263954939 - 2¹⁶ = 263889403 is a prime.

It is not a weakly prime, because it can be changed into another prime (263954909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131977469 + 131977470.

It is an arithmetic number, because the mean of its divisors is an integer number (131977470).

Almost surely, 2^263954939 is an apocalyptic number.

263954939 is a deficient number, since it is larger than the sum of its proper divisors (1).

263954939 is an equidigital number, since it uses as much as digits as its factorization.

263954939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 50.

The square root of 263954939 is about 16246.6900936775. The cubic root of 263954939 is about 641.4703652596.

The spelling of 263954939 in words is "two hundred sixty-three million, nine hundred fifty-four thousand, nine hundred thirty-nine".