1039493621 has 2 divisors, whose sum is σ = 1039493622. Its totient is φ = 1039493620.

The previous prime is 1039493617. The next prime is 1039493639. The reversal of 1039493621 is 1263949301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 924768100 + 114725521 = 30410^2 + 10711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1039493621 - 2² = 1039493617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1039493641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519746810 + 519746811.

It is an arithmetic number, because the mean of its divisors is an integer number (519746811).

Almost surely, 2^1039493621 is an apocalyptic number.

It is an amenable number.

1039493621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039493621 is an equidigital number, since it uses as much as digits as its factorization.

1039493621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 1039493621 is about 32241.1789641756. The cubic root of 1039493621 is about 1012.9949403793.

The spelling of 1039493621 in words is "one billion, thirty-nine million, four hundred ninety-three thousand, six hundred twenty-one".