2172648697 has 2 divisors, whose sum is σ = 2172648698. Its totient is φ = 2172648696.

The previous prime is 2172648631. The next prime is 2172648749. The reversal of 2172648697 is 7968462712.

It is an a-pointer prime, because the next prime (2172648749) can be obtained adding 2172648697 to its sum of digits (52).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1759299136 + 413349561 = 41944^2 + 20331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2172648697 is a prime.

It is not a weakly prime, because it can be changed into another prime (2172648607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086324348 + 1086324349.

It is an arithmetic number, because the mean of its divisors is an integer number (1086324349).

Almost surely, 2^2172648697 is an apocalyptic number.

It is an amenable number.

2172648697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172648697 is an equidigital number, since it uses as much as digits as its factorization.

2172648697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The square root of 2172648697 is about 46611.6798345651. The cubic root of 2172648697 is about 1295.1791261986.

The spelling of 2172648697 in words is "two billion, one hundred seventy-two million, six hundred forty-eight thousand, six hundred ninety-seven".