1137238989 has 4 divisors (see below), whose sum is σ = 1516318656. Its totient is φ = 758159324.

The previous prime is 1137238981. The next prime is 1137239009. The reversal of 1137238989 is 9898327311.

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.

It is a cyclic number.

It is not a de Polignac number, because 1137238989 - 2³ = 1137238981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1137238981) 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, 189539829 + ... + 189539834.

It is an arithmetic number, because the mean of its divisors is an integer number (379079664).

Almost surely, 2^1137238989 is an apocalyptic number.

It is an amenable number.

1137238989 is a deficient number, since it is larger than the sum of its proper divisors (379079667).

1137238989 is an equidigital number, since it uses as much as digits as its factorization.

1137238989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379079666.

The product of its digits is 653184, while the sum is 51.

The square root of 1137238989 is about 33722.9742015736. The cubic root of 1137238989 is about 1043.7998902659.

The spelling of 1137238989 in words is "one billion, one hundred thirty-seven million, two hundred thirty-eight thousand, nine hundred eighty-nine".