1137872009 has 4 divisors (see below), whose sum is σ = 1140340740. Its totient is φ = 1135403280.

The previous prime is 1137871993. The next prime is 1137872011. The reversal of 1137872009 is 9002787311.

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 804006025 + 333865984 = 28355^2 + 18272^2 .

It is a cyclic number.

It is not a de Polignac number, because 1137872009 - 2⁴ = 1137871993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1137872039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233674 + ... + 1234595.

It is an arithmetic number, because the mean of its divisors is an integer number (285085185).

Almost surely, 2^1137872009 is an apocalyptic number.

It is an amenable number.

1137872009 is a deficient number, since it is larger than the sum of its proper divisors (2468731).

1137872009 is an equidigital number, since it uses as much as digits as its factorization.

1137872009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468730.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 1137872009 is about 33732.3584855847. The cubic root of 1137872009 is about 1043.9935240444.

The spelling of 1137872009 in words is "one billion, one hundred thirty-seven million, eight hundred seventy-two thousand, nine".