1118700991 has 2 divisors, whose sum is σ = 1118700992. Its totient is φ = 1118700990.

The previous prime is 1118700977. The next prime is 1118701007. The reversal of 1118700991 is 1990078111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1118700991 - 2¹¹ = 1118698943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1118700991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118700911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559350495 + 559350496.

It is an arithmetic number, because the mean of its divisors is an integer number (559350496).

Almost surely, 2^1118700991 is an apocalyptic number.

1118700991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118700991 is an equidigital number, since it uses as much as digits as its factorization.

1118700991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 37.

The square root of 1118700991 is about 33446.9877716963. The cubic root of 1118700991 is about 1038.0971712052.

The spelling of 1118700991 in words is "one billion, one hundred eighteen million, seven hundred thousand, nine hundred ninety-one".