1027118861 has 2 divisors, whose sum is σ = 1027118862. Its totient is φ = 1027118860.

The previous prime is 1027118849. The next prime is 1027118879. The reversal of 1027118861 is 1688117201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 956726761 + 70392100 = 30931^2 + 8390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1027118861 - 2²² = 1022924557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1027118821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513559430 + 513559431.

It is an arithmetic number, because the mean of its divisors is an integer number (513559431).

Almost surely, 2^1027118861 is an apocalyptic number.

It is an amenable number.

1027118861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1027118861 is an equidigital number, since it uses as much as digits as its factorization.

1027118861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 35.

The square root of 1027118861 is about 32048.6951528451. The cubic root of 1027118861 is about 1008.9591148904.

The spelling of 1027118861 in words is "one billion, twenty-seven million, one hundred eighteen thousand, eight hundred sixty-one".