1173263213 has 4 divisors (see below), whose sum is σ = 1200548448. Its totient is φ = 1145977980.

The previous prime is 1173263153. The next prime is 1173263219. The reversal of 1173263213 is 3123623711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3123623711 = 13 ⋅240278747.

It is a cyclic number.

It is not a de Polignac number, because 1173263213 - 2¹² = 1173259117 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 (1173263219) 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, 13642553 + ... + 13642638.

It is an arithmetic number, because the mean of its divisors is an integer number (300137112).

Almost surely, 2^1173263213 is an apocalyptic number.

It is an amenable number.

1173263213 is a deficient number, since it is larger than the sum of its proper divisors (27285235).

1173263213 is an equidigital number, since it uses as much as digits as its factorization.

1173263213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27285234.

The product of its digits is 4536, while the sum is 29.

The square root of 1173263213 is about 34252.9299914620. The cubic root of 1173263213 is about 1054.7069746160.

Adding to 1173263213 its reverse (3123623711), we get a palindrome (4296886924).

The spelling of 1173263213 in words is "one billion, one hundred seventy-three million, two hundred sixty-three thousand, two hundred thirteen".