1940220859 has 2 divisors, whose sum is σ = 1940220860. Its totient is φ = 1940220858.

The previous prime is 1940220847. The next prime is 1940220949. The reversal of 1940220859 is 9580220491.

It is a weak prime.

It is an emirp because it is prime and its reverse (9580220491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1940220859 - 2⁵ = 1940220827 is a prime.

It is not a weakly prime, because it can be changed into another prime (1940220809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970110429 + 970110430.

It is an arithmetic number, because the mean of its divisors is an integer number (970110430).

Almost surely, 2^1940220859 is an apocalyptic number.

1940220859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940220859 is an equidigital number, since it uses as much as digits as its factorization.

1940220859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1940220859 is about 44047.9381923831. The cubic root of 1940220859 is about 1247.2410315413.

The spelling of 1940220859 in words is "one billion, nine hundred forty million, two hundred twenty thousand, eight hundred fifty-nine".