7148195209 has 9 divisors (see below), whose sum is σ = 7276482343. Its totient is φ = 7022135632.

The previous prime is 7148195203. The next prime is 7148195281. The reversal of 7148195209 is 9025918417.

The square root of 7148195209 is 84547.

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., 5928230025 + 1219965184 = 76995^2 + 34928^2 .

It is not a de Polignac number, because 7148195209 - 2¹³ = 7148187017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7148195203) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4987557 + ... + 4988989.

Almost surely, 2^7148195209 is an apocalyptic number.

7148195209 is the 84547-th square number.

7148195209 is the 42274-th centered octagonal number.

It is an amenable number.

7148195209 is a deficient number, since it is larger than the sum of its proper divisors (128287134).

7148195209 is an frugal number, since it uses more digits than its factorization.

7148195209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The cubic root of 7148195209 is about 1926.3364158022.

The spelling of 7148195209 in words is "seven billion, one hundred forty-eight million, one hundred ninety-five thousand, two hundred nine".