1142731769 has 2 divisors, whose sum is σ = 1142731770. Its totient is φ = 1142731768.

The previous prime is 1142731697. The next prime is 1142731783. The reversal of 1142731769 is 9671372411.

Together with previous prime (1142731697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 974251369 + 168480400 = 31213^2 + 12980^2 .

It is an emirp because it is prime and its reverse (9671372411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1142731769 - 2²⁴ = 1125954553 is a prime.

It is a super-2 number, since 2×1142731769² = 2611671791763738722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1142731169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571365884 + 571365885.

It is an arithmetic number, because the mean of its divisors is an integer number (571365885).

Almost surely, 2^1142731769 is an apocalyptic number.

It is an amenable number.

1142731769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142731769 is an equidigital number, since it uses as much as digits as its factorization.

1142731769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 1142731769 is about 33804.3158339287. The cubic root of 1142731769 is about 1045.4776839787.

The spelling of 1142731769 in words is "one billion, one hundred forty-two million, seven hundred thirty-one thousand, seven hundred sixty-nine".