1072431509 has 2 divisors, whose sum is σ = 1072431510. Its totient is φ = 1072431508.

The previous prime is 1072431487. The next prime is 1072431517. The reversal of 1072431509 is 9051342701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1065826609 + 6604900 = 32647^2 + 2570^2 .

It is an emirp because it is prime and its reverse (9051342701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1072431509 - 2¹² = 1072427413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1072431559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536215754 + 536215755.

It is an arithmetic number, because the mean of its divisors is an integer number (536215755).

Almost surely, 2^1072431509 is an apocalyptic number.

It is an amenable number.

1072431509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1072431509 is an equidigital number, since it uses as much as digits as its factorization.

1072431509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1072431509 is about 32748.0000763405. Note that the first 4 decimals coincide. The cubic root of 1072431509 is about 1023.5832925271.

The spelling of 1072431509 in words is "one billion, seventy-two million, four hundred thirty-one thousand, five hundred nine".