1018916761 has 2 divisors, whose sum is σ = 1018916762. Its totient is φ = 1018916760.

The previous prime is 1018916737. The next prime is 1018916791. The reversal of 1018916761 is 1676198101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 580810000 + 438106761 = 24100^2 + 20931^2 .

It is an emirp because it is prime and its reverse (1676198101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1018916761 - 2¹⁵ = 1018883993 is a prime.

It is a super-2 number, since 2×1018916761² = 2076382731693462242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1018916791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509458380 + 509458381.

It is an arithmetic number, because the mean of its divisors is an integer number (509458381).

Almost surely, 2^1018916761 is an apocalyptic number.

It is an amenable number.

1018916761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018916761 is an equidigital number, since it uses as much as digits as its factorization.

1018916761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1018916761 is about 31920.4755760311. The cubic root of 1018916761 is about 1006.2662392297.

The spelling of 1018916761 in words is "one billion, eighteen million, nine hundred sixteen thousand, seven hundred sixty-one".