2172435647 has 2 divisors, whose sum is σ = 2172435648. Its totient is φ = 2172435646.

The previous prime is 2172435631. The next prime is 2172435673. The reversal of 2172435647 is 7465342712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2172435647 - 2⁴ = 2172435631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172435607) 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 as a sum of consecutive naturals, namely, 1086217823 + 1086217824.

It is an arithmetic number, because the mean of its divisors is an integer number (1086217824).

Almost surely, 2^2172435647 is an apocalyptic number.

2172435647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172435647 is an equidigital number, since it uses as much as digits as its factorization.

2172435647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 41.

The square root of 2172435647 is about 46609.3944071364. The cubic root of 2172435647 is about 1295.1367897126.

The spelling of 2172435647 in words is "two billion, one hundred seventy-two million, four hundred thirty-five thousand, six hundred forty-seven".