1039156661 has 2 divisors, whose sum is σ = 1039156662. Its totient is φ = 1039156660.

The previous prime is 1039156649. The next prime is 1039156663. The reversal of 1039156661 is 1666519301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 935748100 + 103408561 = 30590^2 + 10169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1039156661 is a prime.

It is a super-2 number, since 2×1039156661² = 2159693132201337842, which contains 22 as substring.

Together with 1039156663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1039156663) 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, 519578330 + 519578331.

It is an arithmetic number, because the mean of its divisors is an integer number (519578331).

Almost surely, 2^1039156661 is an apocalyptic number.

It is an amenable number.

1039156661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039156661 is an equidigital number, since it uses as much as digits as its factorization.

1039156661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 1039156661 is about 32235.9529252665. The cubic root of 1039156661 is about 1012.8854718017.

The spelling of 1039156661 in words is "one billion, thirty-nine million, one hundred fifty-six thousand, six hundred sixty-one".