1027173661 has 2 divisors, whose sum is σ = 1027173662. Its totient is φ = 1027173660.

The previous prime is 1027173647. The next prime is 1027173683. The reversal of 1027173661 is 1663717201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793267225 + 233906436 = 28165^2 + 15294^2 .

It is a cyclic number.

It is not a de Polignac number, because 1027173661 - 2⁹ = 1027173149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1027173601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513586830 + 513586831.

It is an arithmetic number, because the mean of its divisors is an integer number (513586831).

Almost surely, 2^1027173661 is an apocalyptic number.

It is an amenable number.

1027173661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1027173661 is an equidigital number, since it uses as much as digits as its factorization.

1027173661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1027173661 is about 32049.5500904459. The cubic root of 1027173661 is about 1008.9770582782.

The spelling of 1027173661 in words is "one billion, twenty-seven million, one hundred seventy-three thousand, six hundred sixty-one".