1206638263 has 8 divisors (see below), whose sum is σ = 1270465920. Its totient is φ = 1142842680.

The previous prime is 1206638239. The next prime is 1206638281. The reversal of 1206638263 is 3628366021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1206638263 - 2¹⁷ = 1206507191 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 (1206638063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132606 + ... + 141412.

It is an arithmetic number, because the mean of its divisors is an integer number (158808240).

Almost surely, 2^1206638263 is an apocalyptic number.

1206638263 is a deficient number, since it is larger than the sum of its proper divisors (63827657).

1206638263 is an equidigital number, since it uses as much as digits as its factorization.

1206638263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16037.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 1206638263 is about 34736.6990803674. The cubic root of 1206638263 is about 1064.6144689608.

The spelling of 1206638263 in words is "one billion, two hundred six million, six hundred thirty-eight thousand, two hundred sixty-three".