1013025661 has 2 divisors, whose sum is σ = 1013025662. Its totient is φ = 1013025660.

The previous prime is 1013025649. The next prime is 1013025683. The reversal of 1013025661 is 1665203101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 788205625 + 224820036 = 28075^2 + 14994^2 .

It is an emirp because it is prime and its reverse (1665203101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013025661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1013026661) 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, 506512830 + 506512831.

It is an arithmetic number, because the mean of its divisors is an integer number (506512831).

Almost surely, 2^1013025661 is an apocalyptic number.

It is an amenable number.

1013025661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013025661 is an equidigital number, since it uses as much as digits as its factorization.

1013025661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1013025661 is about 31828.0640473152. The cubic root of 1013025661 is about 1004.3231702658.

Adding to 1013025661 its reverse (1665203101), we get a palindrome (2678228762).

The spelling of 1013025661 in words is "one billion, thirteen million, twenty-five thousand, six hundred sixty-one".