1031133661 has 2 divisors, whose sum is σ = 1031133662. Its totient is φ = 1031133660.

The previous prime is 1031133613. The next prime is 1031133671. The reversal of 1031133661 is 1663311301.

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., 639331225 + 391802436 = 25285^2 + 19794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031133661 - 2¹⁵ = 1031100893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031133671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515566830 + 515566831.

It is an arithmetic number, because the mean of its divisors is an integer number (515566831).

Almost surely, 2^1031133661 is an apocalyptic number.

It is an amenable number.

1031133661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031133661 is an equidigital number, since it uses as much as digits as its factorization.

1031133661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1031133661 is about 32111.2699997991. The cubic root of 1031133661 is about 1010.2720114987.

Adding to 1031133661 its reverse (1663311301), we get a palindrome (2694444962).

The spelling of 1031133661 in words is "one billion, thirty-one million, one hundred thirty-three thousand, six hundred sixty-one".