70197509 has 2 divisors, whose sum is σ = 70197510. Its totient is φ = 70197508.

The previous prime is 70197503. The next prime is 70197553. The reversal of 70197509 is 90579107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60450625 + 9746884 = 7775^2 + 3122^2 .

It is an emirp because it is prime and its reverse (90579107) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70197509 - 2¹² = 70193413 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70197503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35098754 + 35098755.

It is an arithmetic number, because the mean of its divisors is an integer number (35098755).

Almost surely, 2^70197509 is an apocalyptic number.

It is an amenable number.

70197509 is a deficient number, since it is larger than the sum of its proper divisors (1).

70197509 is an equidigital number, since it uses as much as digits as its factorization.

70197509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19845, while the sum is 38.

The square root of 70197509 is about 8378.3953714300. The cubic root of 70197509 is about 412.5157807247.

The spelling of 70197509 in words is "seventy million, one hundred ninety-seven thousand, five hundred nine".