1012031509 has 2 divisors, whose sum is σ = 1012031510. Its totient is φ = 1012031508.

The previous prime is 1012031483. The next prime is 1012031519. The reversal of 1012031509 is 9051302101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 770229009 + 241802500 = 27753^2 + 15550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012031509 - 2⁵ = 1012031477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012031509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012031519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506015754 + 506015755.

It is an arithmetic number, because the mean of its divisors is an integer number (506015755).

Almost surely, 2^1012031509 is an apocalyptic number.

It is an amenable number.

1012031509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012031509 is an equidigital number, since it uses as much as digits as its factorization.

1012031509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 1012031509 is about 31812.4426757833. The cubic root of 1012031509 is about 1003.9945255200.

The spelling of 1012031509 in words is "one billion, twelve million, thirty-one thousand, five hundred nine".