1031990039 has 2 divisors, whose sum is σ = 1031990040. Its totient is φ = 1031990038.

The previous prime is 1031989961. The next prime is 1031990077. The reversal of 1031990039 is 9300991301.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031990039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031989990 and 1031990008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031990639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515995019 + 515995020.

It is an arithmetic number, because the mean of its divisors is an integer number (515995020).

Almost surely, 2^1031990039 is an apocalyptic number.

1031990039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031990039 is an equidigital number, since it uses as much as digits as its factorization.

1031990039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 1031990039 is about 32124.6017718508. The cubic root of 1031990039 is about 1010.5516180950.

The spelling of 1031990039 in words is "one billion, thirty-one million, nine hundred ninety thousand, thirty-nine".