1031390839 has 2 divisors, whose sum is σ = 1031390840. Its totient is φ = 1031390838.

The previous prime is 1031390821. The next prime is 1031390849. The reversal of 1031390839 is 9380931301.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031390839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031390798 and 1031390807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031390849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515695419 + 515695420.

It is an arithmetic number, because the mean of its divisors is an integer number (515695420).

Almost surely, 2^1031390839 is an apocalyptic number.

1031390839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031390839 is an equidigital number, since it uses as much as digits as its factorization.

1031390839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 1031390839 is about 32115.2742320535. The cubic root of 1031390839 is about 1010.3559961289.

The spelling of 1031390839 in words is "one billion, thirty-one million, three hundred ninety thousand, eight hundred thirty-nine".