1618938043 has 2 divisors, whose sum is σ = 1618938044. Its totient is φ = 1618938042.

The previous prime is 1618938031. The next prime is 1618938047. The reversal of 1618938043 is 3408398161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1618938043 - 2⁹ = 1618937531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1618938047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809469021 + 809469022.

It is an arithmetic number, because the mean of its divisors is an integer number (809469022).

Almost surely, 2^1618938043 is an apocalyptic number.

1618938043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618938043 is an equidigital number, since it uses as much as digits as its factorization.

1618938043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1618938043 is about 40236.0291654134. The cubic root of 1618938043 is about 1174.2036053221.

The spelling of 1618938043 in words is "one billion, six hundred eighteen million, nine hundred thirty-eight thousand, forty-three".