1914137861 has 2 divisors, whose sum is σ = 1914137862. Its totient is φ = 1914137860.

The previous prime is 1914137857. The next prime is 1914137917. The reversal of 1914137861 is 1687314191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1899652225 + 14485636 = 43585^2 + 3806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1914137861 - 2² = 1914137857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1914137821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 957068930 + 957068931.

It is an arithmetic number, because the mean of its divisors is an integer number (957068931).

Almost surely, 2^1914137861 is an apocalyptic number.

It is an amenable number.

1914137861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1914137861 is an equidigital number, since it uses as much as digits as its factorization.

1914137861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 1914137861 is about 43750.8612600941. The cubic root of 1914137861 is about 1241.6267802711.

The spelling of 1914137861 in words is "one billion, nine hundred fourteen million, one hundred thirty-seven thousand, eight hundred sixty-one".