1131606073 has 4 divisors (see below), whose sum is σ = 1218652708. Its totient is φ = 1044559440.

The previous prime is 1131606061. The next prime is 1131606079. The reversal of 1131606073 is 3706061311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 677404729 + 454201344 = 26027^2 + 21312^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131606073 - 2¹³ = 1131597881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131606079) 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, 43523298 + ... + 43523323.

It is an arithmetic number, because the mean of its divisors is an integer number (304663177).

Almost surely, 2^1131606073 is an apocalyptic number.

1131606073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1131606073 is a deficient number, since it is larger than the sum of its proper divisors (87046635).

1131606073 is an equidigital number, since it uses as much as digits as its factorization.

1131606073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87046634.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1131606073 is about 33639.3530407468. The cubic root of 1131606073 is about 1042.0736710229.

Adding to 1131606073 its reverse (3706061311), we get a palindrome (4837667384).

The spelling of 1131606073 in words is "one billion, one hundred thirty-one million, six hundred six thousand, seventy-three".