1612211317 has 2 divisors, whose sum is σ = 1612211318. Its totient is φ = 1612211316.

The previous prime is 1612211309. The next prime is 1612211353. The reversal of 1612211317 is 7131122161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1592488836 + 19722481 = 39906^2 + 4441^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612211317 - 2³ = 1612211309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1612211291 and 1612211300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1612211357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806105658 + 806105659.

It is an arithmetic number, because the mean of its divisors is an integer number (806105659).

Almost surely, 2^1612211317 is an apocalyptic number.

It is an amenable number.

1612211317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612211317 is an equidigital number, since it uses as much as digits as its factorization.

1612211317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 25.

The square root of 1612211317 is about 40152.3513259186. The cubic root of 1612211317 is about 1172.5750664111.

Adding to 1612211317 its reverse (7131122161), we get a palindrome (8743333478).

The spelling of 1612211317 in words is "one billion, six hundred twelve million, two hundred eleven thousand, three hundred seventeen".