70259509 has 2 divisors, whose sum is σ = 70259510. Its totient is φ = 70259508.

The previous prime is 70259477. The next prime is 70259533. The reversal of 70259509 is 90595207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69056100 + 1203409 = 8310^2 + 1097^2 .

It is a cyclic number.

It is not a de Polignac number, because 70259509 - 2⁵ = 70259477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70259569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35129754 + 35129755.

It is an arithmetic number, because the mean of its divisors is an integer number (35129755).

Almost surely, 2^70259509 is an apocalyptic number.

It is an amenable number.

70259509 is a deficient number, since it is larger than the sum of its proper divisors (1).

70259509 is an equidigital number, since it uses as much as digits as its factorization.

70259509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 70259509 is about 8382.0945473074. The cubic root of 70259509 is about 412.6371926889.

The spelling of 70259509 in words is "seventy million, two hundred fifty-nine thousand, five hundred nine".