1239473663 has 4 divisors (see below), whose sum is σ = 1252251840. Its totient is φ = 1226695488.

The previous prime is 1239473629. The next prime is 1239473671. The reversal of 1239473663 is 3663749321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3663749321 = 17497 ⋅209393.

It is a cyclic number.

It is not a de Polignac number, because 1239473663 - 2¹⁴ = 1239457279 is a prime.

It is a super-2 number, since 2×1239473663² = 3072589922541275138, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239473603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6388943 + ... + 6389136.

It is an arithmetic number, because the mean of its divisors is an integer number (313062960).

Almost surely, 2^1239473663 is an apocalyptic number.

1239473663 is a deficient number, since it is larger than the sum of its proper divisors (12778177).

1239473663 is an equidigital number, since it uses as much as digits as its factorization.

1239473663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12778176.

The product of its digits is 489888, while the sum is 44.

The square root of 1239473663 is about 35206.1594468922. The cubic root of 1239473663 is about 1074.1850431996.

The spelling of 1239473663 in words is "one billion, two hundred thirty-nine million, four hundred seventy-three thousand, six hundred sixty-three".