1143263764 has 6 divisors (see below), whose sum is σ = 2000711594. Its totient is φ = 571631880.

The previous prime is 1143263749. The next prime is 1143263773. The reversal of 1143263764 is 4673623411.

It can be written as a sum of positive squares in only one way, i.e., 980190864 + 163072900 = 31308^2 + 12770^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142907967 + ... + 142907974.

Almost surely, 2^1143263764 is an apocalyptic number.

It is an amenable number.

1143263764 is a deficient number, since it is larger than the sum of its proper divisors (857447830).

1143263764 is a wasteful number, since it uses less digits than its factorization.

1143263764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285815945 (or 285815943 counting only the distinct ones).

The product of its digits is 72576, while the sum is 37.

The square root of 1143263764 is about 33812.1836621062. The cubic root of 1143263764 is about 1045.6398983692.

The spelling of 1143263764 in words is "one billion, one hundred forty-three million, two hundred sixty-three thousand, seven hundred sixty-four".