70949309 has 4 divisors (see below), whose sum is σ = 71317116. Its totient is φ = 70581504.

The previous prime is 70949303. The next prime is 70949323. The reversal of 70949309 is 90394907.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9765625 + 61183684 = 3125^2 + 7822^2 .

It is a cyclic number.

It is not a de Polignac number, because 70949309 - 2⁴ = 70949293 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 (70949303) 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, 183614 + ... + 183999.

It is an arithmetic number, because the mean of its divisors is an integer number (17829279).

Almost surely, 2^70949309 is an apocalyptic number.

It is an amenable number.

70949309 is a deficient number, since it is larger than the sum of its proper divisors (367807).

70949309 is a wasteful number, since it uses less digits than its factorization.

70949309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367806.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 70949309 is about 8423.1412786442. The cubic root of 70949309 is about 413.9832058502.

The spelling of 70949309 in words is "seventy million, nine hundred forty-nine thousand, three hundred nine".