1145431019 has 2 divisors, whose sum is σ = 1145431020. Its totient is φ = 1145431018.

The previous prime is 1145431003. The next prime is 1145431057. The reversal of 1145431019 is 9101345411.

It is a weak prime.

It is an emirp because it is prime and its reverse (9101345411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145431019 - 2⁴ = 1145431003 is a prime.

It is a super-2 number, since 2×1145431019² = 2624024438574756722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1145430982 and 1145431000.

It is not a weakly prime, because it can be changed into another prime (1145431319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572715509 + 572715510.

It is an arithmetic number, because the mean of its divisors is an integer number (572715510).

Almost surely, 2^1145431019 is an apocalyptic number.

1145431019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145431019 is an equidigital number, since it uses as much as digits as its factorization.

1145431019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1145431019 is about 33844.2169210635. The cubic root of 1145431019 is about 1046.3002119683.

The spelling of 1145431019 in words is "one billion, one hundred forty-five million, four hundred thirty-one thousand, nineteen".