1940172673 has 2 divisors, whose sum is σ = 1940172674. Its totient is φ = 1940172672.

The previous prime is 1940172629. The next prime is 1940172709. The reversal of 1940172673 is 3762710491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1225840144 + 714332529 = 35012^2 + 26727^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940172673 - 2²¹ = 1938075521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1940172623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970086336 + 970086337.

It is an arithmetic number, because the mean of its divisors is an integer number (970086337).

Almost surely, 2^1940172673 is an apocalyptic number.

It is an amenable number.

1940172673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940172673 is an equidigital number, since it uses as much as digits as its factorization.

1940172673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 1940172673 is about 44047.3912167338. The cubic root of 1940172673 is about 1247.2307062471.

The spelling of 1940172673 in words is "one billion, nine hundred forty million, one hundred seventy-two thousand, six hundred seventy-three".