1868118929 has 2 divisors, whose sum is σ = 1868118930. Its totient is φ = 1868118928.

The previous prime is 1868118887. The next prime is 1868118943. The reversal of 1868118929 is 9298118681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1843843600 + 24275329 = 42940^2 + 4927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868118929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1868114929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934059464 + 934059465.

It is an arithmetic number, because the mean of its divisors is an integer number (934059465).

Almost surely, 2^1868118929 is an apocalyptic number.

It is an amenable number.

1868118929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868118929 is an equidigital number, since it uses as much as digits as its factorization.

1868118929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 53.

The square root of 1868118929 is about 43221.7413924983. The cubic root of 1868118929 is about 1231.5957276131.

The spelling of 1868118929 in words is "one billion, eight hundred sixty-eight million, one hundred eighteen thousand, nine hundred twenty-nine".