1217552069 has 2 divisors, whose sum is σ = 1217552070. Its totient is φ = 1217552068.

The previous prime is 1217552059. The next prime is 1217552101. The reversal of 1217552069 is 9602557121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203187969 + 14364100 = 34687^2 + 3790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217552069 - 2⁸ = 1217551813 is a prime.

It is a super-2 number, since 2×1217552069² = 2964866081452361522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217552059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608776034 + 608776035.

It is an arithmetic number, because the mean of its divisors is an integer number (608776035).

Almost surely, 2^1217552069 is an apocalyptic number.

It is an amenable number.

1217552069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217552069 is an equidigital number, since it uses as much as digits as its factorization.

1217552069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 1217552069 is about 34893.4387671952. The cubic root of 1217552069 is about 1067.8145830278.

The spelling of 1217552069 in words is "one billion, two hundred seventeen million, five hundred fifty-two thousand, sixty-nine".