2172648723 has 8 divisors (see below), whose sum is σ = 3310702848. Its totient is φ = 1241513544.

The previous prime is 2172648697. The next prime is 2172648749. The reversal of 2172648723 is 3278462712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2172648697) and next prime (2172648749).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2172648723 - 2⁹ = 2172648211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2172648763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51729711 + ... + 51729752.

It is an arithmetic number, because the mean of its divisors is an integer number (413837856).

Almost surely, 2^2172648723 is an apocalyptic number.

2172648723 is a deficient number, since it is larger than the sum of its proper divisors (1138054125).

2172648723 is a wasteful number, since it uses less digits than its factorization.

2172648723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103459473.

The product of its digits is 225792, while the sum is 42.

The square root of 2172648723 is about 46611.6801134651. The cubic root of 2172648723 is about 1295.1791313650.

The spelling of 2172648723 in words is "two billion, one hundred seventy-two million, six hundred forty-eight thousand, seven hundred twenty-three".