1137849809 has 4 divisors (see below), whose sum is σ = 1139133504. Its totient is φ = 1136566116.

The previous prime is 1137849799. The next prime is 1137849841. The reversal of 1137849809 is 9089487311.

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: 9089487311 = 19 ⋅478394069.

It is a cyclic number.

It is not a de Polignac number, because 1137849809 - 2¹⁶ = 1137784273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1137845809) 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, 640517 + ... + 642290.

It is an arithmetic number, because the mean of its divisors is an integer number (284783376).

Almost surely, 2^1137849809 is an apocalyptic number.

It is an amenable number.

1137849809 is a deficient number, since it is larger than the sum of its proper divisors (1283695).

1137849809 is an equidigital number, since it uses as much as digits as its factorization.

1137849809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283694.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 1137849809 is about 33732.0294230869. The cubic root of 1137849809 is about 1043.9867345266.

The spelling of 1137849809 in words is "one billion, one hundred thirty-seven million, eight hundred forty-nine thousand, eight hundred nine".