1667315917 has 2 divisors, whose sum is σ = 1667315918. Its totient is φ = 1667315916.

The previous prime is 1667315891. The next prime is 1667315939. The reversal of 1667315917 is 7195137661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1538129961 + 129185956 = 39219^2 + 11366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1667315917 - 2⁷ = 1667315789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1667315017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833657958 + 833657959.

It is an arithmetic number, because the mean of its divisors is an integer number (833657959).

Almost surely, 2^1667315917 is an apocalyptic number.

It is an amenable number.

1667315917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667315917 is an equidigital number, since it uses as much as digits as its factorization.

1667315917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 46.

The square root of 1667315917 is about 40832.7799323044. The cubic root of 1667315917 is about 1185.7850357876.

The spelling of 1667315917 in words is "one billion, six hundred sixty-seven million, three hundred fifteen thousand, nine hundred seventeen".