1672447817 has 2 divisors, whose sum is σ = 1672447818. Its totient is φ = 1672447816.

The previous prime is 1672447801. The next prime is 1672447837. The reversal of 1672447817 is 7187442761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203465481 + 468982336 = 34691^2 + 21656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672447817 - 2⁴ = 1672447801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1672447837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836223908 + 836223909.

It is an arithmetic number, because the mean of its divisors is an integer number (836223909).

Almost surely, 2^1672447817 is an apocalyptic number.

It is an amenable number.

1672447817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672447817 is an equidigital number, since it uses as much as digits as its factorization.

1672447817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 526848, while the sum is 47.

The square root of 1672447817 is about 40895.5720952770. The cubic root of 1672447817 is about 1187.0003818394. Note that the first 3 decimals are identical.

The spelling of 1672447817 in words is "one billion, six hundred seventy-two million, four hundred forty-seven thousand, eight hundred seventeen".