7097557009 has 3 divisors (see below), whose sum is σ = 7097641257. Its totient is φ = 7097472762.

The previous prime is 7097556943. The next prime is 7097557031. The reversal of 7097557009 is 9007557907.

The square root of 7097557009 is 84247.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-7097557009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7097557309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 42124 + ... + 126370.

It is an arithmetic number, because the mean of its divisors is an integer number (2365880419).

Almost surely, 2^7097557009 is an apocalyptic number.

7097557009 is the 84247-th square number.

7097557009 is the 42124-th centered octagonal number.

It is an amenable number.

7097557009 is a deficient number, since it is larger than the sum of its proper divisors (84248).

7097557009 is an frugal number, since it uses more digits than its factorization.

7097557009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168494 (or 84247 counting only the distinct ones).

The product of its (nonzero) digits is 694575, while the sum is 49.

The cubic root of 7097557009 is about 1921.7768751290.

Multiplying 7097557009 by its sum of digits (49), we get a square (347780293441 = 589729²).

The spelling of 7097557009 in words is "seven billion, ninety-seven million, five hundred fifty-seven thousand, nine".