2173378741 has 2 divisors, whose sum is σ = 2173378742. Its totient is φ = 2173378740.

The previous prime is 2173378733. The next prime is 2173378751. The reversal of 2173378741 is 1478733712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1533035716 + 640343025 = 39154^2 + 25305^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173378741 - 2³ = 2173378733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2173378751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086689370 + 1086689371.

It is an arithmetic number, because the mean of its divisors is an integer number (1086689371).

Almost surely, 2^2173378741 is an apocalyptic number.

It is an amenable number.

2173378741 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173378741 is an equidigital number, since it uses as much as digits as its factorization.

2173378741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 43.

The square root of 2173378741 is about 46619.5103041634. The cubic root of 2173378741 is about 1295.3241767791.

The spelling of 2173378741 in words is "two billion, one hundred seventy-three million, three hundred seventy-eight thousand, seven hundred forty-one".