70852309 has 4 divisors (see below), whose sum is σ = 77293440. Its totient is φ = 64411180.

The previous prime is 70852303. The next prime is 70852321. The reversal of 70852309 is 90325807.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70852309 - 2⁷ = 70852181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70852303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3220549 + ... + 3220570.

It is an arithmetic number, because the mean of its divisors is an integer number (19323360).

Almost surely, 2^70852309 is an apocalyptic number.

It is an amenable number.

70852309 is a deficient number, since it is larger than the sum of its proper divisors (6441131).

70852309 is a wasteful number, since it uses less digits than its factorization.

70852309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6441130.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 70852309 is about 8417.3813623953. The cubic root of 70852309 is about 413.7944575467.

The spelling of 70852309 in words is "seventy million, eight hundred fifty-two thousand, three hundred nine".