1172722013 has 4 divisors (see below), whose sum is σ = 1174051008. Its totient is φ = 1171393020.

The previous prime is 1172721983. The next prime is 1172722037. The reversal of 1172722013 is 3102272711.

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: 3102272711 = 43 ⋅72145877.

It is a cyclic number.

It is not a de Polignac number, because 1172722013 - 2¹⁶ = 1172656477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172722063) 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, 663173 + ... + 664938.

It is an arithmetic number, because the mean of its divisors is an integer number (293512752).

Almost surely, 2^1172722013 is an apocalyptic number.

It is an amenable number.

1172722013 is a deficient number, since it is larger than the sum of its proper divisors (1328995).

1172722013 is an equidigital number, since it uses as much as digits as its factorization.

1172722013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328994.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 1172722013 is about 34245.0290261229. The cubic root of 1172722013 is about 1054.5447787854.

Adding to 1172722013 its reverse (3102272711), we get a palindrome (4274994724).

The spelling of 1172722013 in words is "one billion, one hundred seventy-two million, seven hundred twenty-two thousand, thirteen".