1039990640837 has 2 divisors, whose sum is σ = 1039990640838. Its totient is φ = 1039990640836.

The previous prime is 1039990640831. The next prime is 1039990640879. The reversal of 1039990640837 is 7380460999301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525336489601 + 514654151236 = 724801^2 + 717394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1039990640837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1039990640831) 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, 519995320418 + 519995320419.

It is an arithmetic number, because the mean of its divisors is an integer number (519995320419).

Almost surely, 2^{1039990640837} is an apocalyptic number.

It is an amenable number.

1039990640837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039990640837 is an equidigital number, since it uses as much as digits as its factorization.

1039990640837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 1039990640837 in words is "one trillion, thirty-nine billion, nine hundred ninety million, six hundred forty thousand, eight hundred thirty-seven".