1672216417 has 2 divisors, whose sum is σ = 1672216418. Its totient is φ = 1672216416.

The previous prime is 1672216397. The next prime is 1672216423. The reversal of 1672216417 is 7146122761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1000836496 + 671379921 = 31636^2 + 25911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672216417 - 2¹⁵ = 1672183649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1672216457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836108208 + 836108209.

It is an arithmetic number, because the mean of its divisors is an integer number (836108209).

Almost surely, 2^1672216417 is an apocalyptic number.

It is an amenable number.

1672216417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672216417 is an equidigital number, since it uses as much as digits as its factorization.

1672216417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 1672216417 is about 40892.7428402645. The cubic root of 1672216417 is about 1186.9456348283.

It can be divided in two parts, 1672 and 216417, that added together give a square (218089 = 467²).

The spelling of 1672216417 in words is "one billion, six hundred seventy-two million, two hundred sixteen thousand, four hundred seventeen".