1118943971 has 2 divisors, whose sum is σ = 1118943972. Its totient is φ = 1118943970.

The previous prime is 1118943929. The next prime is 1118944009. The reversal of 1118943971 is 1793498111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1118943971 - 2²² = 1114749667 is a prime.

It is a super-2 number, since 2×1118943971² = 2504071220474497682, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1118943071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559471985 + 559471986.

It is an arithmetic number, because the mean of its divisors is an integer number (559471986).

Almost surely, 2^1118943971 is an apocalyptic number.

1118943971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118943971 is an equidigital number, since it uses as much as digits as its factorization.

1118943971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 44.

The square root of 1118943971 is about 33450.6198896224. The cubic root of 1118943971 is about 1038.1723234258.

The spelling of 1118943971 in words is "one billion, one hundred eighteen million, nine hundred forty-three thousand, nine hundred seventy-one".