1012539389 has 2 divisors, whose sum is σ = 1012539390. Its totient is φ = 1012539388.

The previous prime is 1012539343. The next prime is 1012539439. The reversal of 1012539389 is 9839352101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1001216164 + 11323225 = 31642^2 + 3365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012539389 - 2⁸ = 1012539133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012539289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506269694 + 506269695.

It is an arithmetic number, because the mean of its divisors is an integer number (506269695).

Almost surely, 2^1012539389 is an apocalyptic number.

It is an amenable number.

1012539389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012539389 is an equidigital number, since it uses as much as digits as its factorization.

1012539389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1012539389 is about 31820.4240857975. The cubic root of 1012539389 is about 1004.1624463344.

The spelling of 1012539389 in words is "one billion, twelve million, five hundred thirty-nine thousand, three hundred eighty-nine".