7125073409 has 2 divisors, whose sum is σ = 7125073410. Its totient is φ = 7125073408.

The previous prime is 7125073379. The next prime is 7125073421. The reversal of 7125073409 is 9043705217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5943639025 + 1181434384 = 77095^2 + 34372^2 .

It is a cyclic number.

It is not a de Polignac number, because 7125073409 - 2¹² = 7125069313 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7125073309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3562536704 + 3562536705.

It is an arithmetic number, because the mean of its divisors is an integer number (3562536705).

Almost surely, 2^7125073409 is an apocalyptic number.

It is an amenable number.

7125073409 is a deficient number, since it is larger than the sum of its proper divisors (1).

7125073409 is an equidigital number, since it uses as much as digits as its factorization.

7125073409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 7125073409 is about 84410.1499169383. The cubic root of 7125073409 is about 1924.2571741448.

The spelling of 7125073409 in words is "seven billion, one hundred twenty-five million, seventy-three thousand, four hundred nine".