7915127089 has 9 divisors (see below), whose sum is σ = 8107399083. Its totient is φ = 7727317752.

The previous prime is 7915127069. The next prime is 7915127147. The reversal of 7915127089 is 9807215197.

The square root of 7915127089 is 88967.

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., 1240237089 + 6674890000 = 35217^2 + 81700^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7915127089 is a prime.

It is a super-2 number, since 2×7915127089² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7915127069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3824547 + ... + 3826615.

Almost surely, 2^7915127089 is an apocalyptic number.

7915127089 is the 88967-th square number.

7915127089 is the 44484-th centered octagonal number.

It is an amenable number.

7915127089 is a deficient number, since it is larger than the sum of its proper divisors (192271994).

7915127089 is an frugal number, since it uses more digits than its factorization.

7915127089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224 (or 2112 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 49.

The cubic root of 7915127089 is about 1992.9020971034.

Multiplying 7915127089 by its sum of digits (49), we get a square (387841227361 = 622769²).

The spelling of 7915127089 in words is "seven billion, nine hundred fifteen million, one hundred twenty-seven thousand, eighty-nine".