1940193977 has 2 divisors, whose sum is σ = 1940193978. Its totient is φ = 1940193976.

The previous prime is 1940193967. The next prime is 1940194103. The reversal of 1940193977 is 7793910491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1541033536 + 399160441 = 39256^2 + 19979^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940193977 - 2⁴ = 1940193961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1940193907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970096988 + 970096989.

It is an arithmetic number, because the mean of its divisors is an integer number (970096989).

Almost surely, 2^1940193977 is an apocalyptic number.

It is an amenable number.

1940193977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940193977 is an equidigital number, since it uses as much as digits as its factorization.

1940193977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 428652, while the sum is 50.

The square root of 1940193977 is about 44047.6330465100. The cubic root of 1940193977 is about 1247.2352712885.

The spelling of 1940193977 in words is "one billion, nine hundred forty million, one hundred ninety-three thousand, nine hundred seventy-seven".