1016888261 has 2 divisors, whose sum is σ = 1016888262. Its totient is φ = 1016888260.

The previous prime is 1016888183. The next prime is 1016888267. The reversal of 1016888261 is 1628886101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 929091361 + 87796900 = 30481^2 + 9370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1016888261 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1016888267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508444130 + 508444131.

It is an arithmetic number, because the mean of its divisors is an integer number (508444131).

Almost surely, 2^1016888261 is an apocalyptic number.

It is an amenable number.

1016888261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016888261 is an equidigital number, since it uses as much as digits as its factorization.

1016888261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 41.

The square root of 1016888261 is about 31888.6854699280. The cubic root of 1016888261 is about 1005.5980239841.

The spelling of 1016888261 in words is "one billion, sixteen million, eight hundred eighty-eight thousand, two hundred sixty-one".