915849169 has 9 divisors (see below), whose sum is σ = 935093019. Its totient is φ = 896995320.

The previous prime is 915849127. The next prime is 915849223. The reversal of 915849169 is 961948519.

It is a happy number.

The square root of 915849169 is 30263.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 660233025 + 255616144 = 25695^2 + 15988^2 .

It is a de Polignac number, because none of the positive numbers 2^k-915849169 is a prime.

It is a super-2 number, since 2×915849169² = 1677559400715981122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (915849119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1603654 + ... + 1604224.

Almost surely, 2^915849169 is an apocalyptic number.

915849169 is the 30263-rd square number.

915849169 is the 15132-nd centered octagonal number.

It is an amenable number.

915849169 is a deficient number, since it is larger than the sum of its proper divisors (19243850).

915849169 is an frugal number, since it uses more digits than its factorization.

915849169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 624 counting only the distinct ones).

The product of its digits is 699840, while the sum is 52.

The cubic root of 915849169 is about 971.1239209527.

It can be divided in two parts, 915849 and 169, that multiplied together give a square (154778481 = 12441²).

The spelling of 915849169 in words is "nine hundred fifteen million, eight hundred forty-nine thousand, one hundred sixty-nine".