1143378137 has 4 divisors (see below), whose sum is σ = 1247321616. Its totient is φ = 1039434660.

The previous prime is 1143378133. The next prime is 1143378149. The reversal of 1143378137 is 7318733411.

It is a happy number.

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 not a de Polignac number, because 1143378137 - 2² = 1143378133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143378137.

It is not an unprimeable number, because it can be changed into a prime (1143378133) 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, 51971723 + ... + 51971744.

It is an arithmetic number, because the mean of its divisors is an integer number (311830404).

Almost surely, 2^1143378137 is an apocalyptic number.

It is an amenable number.

1143378137 is a deficient number, since it is larger than the sum of its proper divisors (103943479).

1143378137 is a wasteful number, since it uses less digits than its factorization.

1143378137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103943478.

The product of its digits is 42336, while the sum is 38.

The square root of 1143378137 is about 33813.8749184414. The cubic root of 1143378137 is about 1045.6747660839.

The spelling of 1143378137 in words is "one billion, one hundred forty-three million, three hundred seventy-eight thousand, one hundred thirty-seven".