1143389157 has 4 divisors (see below), whose sum is σ = 1524518880. Its totient is φ = 762259436.

The previous prime is 1143389153. The next prime is 1143389167. The reversal of 1143389157 is 7519833411.

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 1143389157 - 2² = 1143389153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143389153) 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, 190564857 + ... + 190564862.

It is an arithmetic number, because the mean of its divisors is an integer number (381129720).

Almost surely, 2^1143389157 is an apocalyptic number.

It is an amenable number.

1143389157 is a deficient number, since it is larger than the sum of its proper divisors (381129723).

1143389157 is an equidigital number, since it uses as much as digits as its factorization.

1143389157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381129722.

The product of its digits is 90720, while the sum is 42.

The square root of 1143389157 is about 33814.0378689088. The cubic root of 1143389157 is about 1045.6781255146.

The spelling of 1143389157 in words is "one billion, one hundred forty-three million, three hundred eighty-nine thousand, one hundred fifty-seven".