1217660233 has 2 divisors, whose sum is σ = 1217660234. Its totient is φ = 1217660232.

The previous prime is 1217660219. The next prime is 1217660237. The reversal of 1217660233 is 3320667121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 895385929 + 322274304 = 29923^2 + 17952^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217660233 - 2¹³ = 1217652041 is a prime.

It is a super-2 number, since 2×1217660233² = 2965392886059228578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1217660195 and 1217660204.

It is not a weakly prime, because it can be changed into another prime (1217660237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608830116 + 608830117.

It is an arithmetic number, because the mean of its divisors is an integer number (608830117).

Almost surely, 2^1217660233 is an apocalyptic number.

It is an amenable number.

1217660233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217660233 is an equidigital number, since it uses as much as digits as its factorization.

1217660233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 1217660233 is about 34894.9886516674. The cubic root of 1217660233 is about 1067.8462026684.

The spelling of 1217660233 in words is "one billion, two hundred seventeen million, six hundred sixty thousand, two hundred thirty-three".