1229174389 has 2 divisors, whose sum is σ = 1229174390. Its totient is φ = 1229174388.

The previous prime is 1229174369. The next prime is 1229174399. The reversal of 1229174389 is 9834719221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209300625 + 19873764 = 34775^2 + 4458^2 .

It is a cyclic number.

It is not a de Polignac number, because 1229174389 - 2²¹ = 1227077237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229174369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614587194 + 614587195.

It is an arithmetic number, because the mean of its divisors is an integer number (614587195).

Almost surely, 2^1229174389 is an apocalyptic number.

It is an amenable number.

1229174389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229174389 is an equidigital number, since it uses as much as digits as its factorization.

1229174389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 1229174389 is about 35059.5834116722. The cubic root of 1229174389 is about 1071.2014887440.

The spelling of 1229174389 in words is "one billion, two hundred twenty-nine million, one hundred seventy-four thousand, three hundred eighty-nine".