1672447717 has 2 divisors, whose sum is σ = 1672447718. Its totient is φ = 1672447716.

The previous prime is 1672447663. The next prime is 1672447729. The reversal of 1672447717 is 7177442761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1107624961 + 564822756 = 33281^2 + 23766^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672447717 - 2⁷ = 1672447589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1672447817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836223858 + 836223859.

It is an arithmetic number, because the mean of its divisors is an integer number (836223859).

Almost surely, 2^1672447717 is an apocalyptic number.

It is an amenable number.

1672447717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672447717 is an equidigital number, since it uses as much as digits as its factorization.

1672447717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460992, while the sum is 46.

The square root of 1672447717 is about 40895.5708726507. The cubic root of 1672447717 is about 1187.0003581814. Note that the first 3 decimals are identical.

The spelling of 1672447717 in words is "one billion, six hundred seventy-two million, four hundred forty-seven thousand, seven hundred seventeen".