915439229 has 2 divisors, whose sum is σ = 915439230. Its totient is φ = 915439228.

The previous prime is 915439183. The next prime is 915439277. The reversal of 915439229 is 922934519.

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., 880605625 + 34833604 = 29675^2 + 5902^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-915439229 is a prime.

It is a super-2 number, since 2×915439229² = 1676057963984228882, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 915439229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (915439289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457719614 + 457719615.

It is an arithmetic number, because the mean of its divisors is an integer number (457719615).

Almost surely, 2^915439229 is an apocalyptic number.

It is an amenable number.

915439229 is a deficient number, since it is larger than the sum of its proper divisors (1).

915439229 is an equidigital number, since it uses as much as digits as its factorization.

915439229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 915439229 is about 30256.2262848492. The cubic root of 915439229 is about 970.9790055503.

The spelling of 915439229 in words is "nine hundred fifteen million, four hundred thirty-nine thousand, two hundred twenty-nine".