263132989 has 6 divisors (see below), whose sum is σ = 306093534. Its totient is φ = 225542520.

The previous prime is 263132981. The next prime is 263132993. The reversal of 263132989 is 989231362.

It can be written as a sum of positive squares in only one way, i.e., 171164889 + 91968100 = 13083^2 + 9590^2 .

It is not a de Polignac number, because 263132989 - 2³ = 263132981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263132981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2684982 + ... + 2685079.

It is an arithmetic number, because the mean of its divisors is an integer number (51015589).

Almost surely, 2^263132989 is an apocalyptic number.

It is an amenable number.

263132989 is a deficient number, since it is larger than the sum of its proper divisors (42960545).

263132989 is an equidigital number, since it uses as much as digits as its factorization.

263132989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5370075 (or 5370068 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 263132989 is about 16221.3744485478. The cubic root of 263132989 is about 640.8038312848.

The spelling of 263132989 in words is "two hundred sixty-three million, one hundred thirty-two thousand, nine hundred eighty-nine".