70573309 has 2 divisors, whose sum is σ = 70573310. Its totient is φ = 70573308.

The previous prime is 70573303. The next prime is 70573313. The reversal of 70573309 is 90337507.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56957209 + 13616100 = 7547^2 + 3690^2 .

It is a cyclic number.

It is not a de Polignac number, because 70573309 - 2¹¹ = 70571261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70573303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35286654 + 35286655.

It is an arithmetic number, because the mean of its divisors is an integer number (35286655).

Almost surely, 2^70573309 is an apocalyptic number.

It is an amenable number.

70573309 is a deficient number, since it is larger than the sum of its proper divisors (1).

70573309 is an equidigital number, since it uses as much as digits as its factorization.

70573309 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 34.

The square root of 70573309 is about 8400.7921650282. The cubic root of 70573309 is about 413.2506007816.

The spelling of 70573309 in words is "seventy million, five hundred seventy-three thousand, three hundred nine".