69949309 has 4 divisors (see below), whose sum is σ = 70395004. Its totient is φ = 69503616.

The previous prime is 69949307. The next prime is 69949349. The reversal of 69949309 is 90394996.

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 38477209 + 31472100 = 6203^2 + 5610^2 .

It is a cyclic number.

It is not a de Polignac number, because 69949309 - 2¹ = 69949307 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 (69949307) 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, 222612 + ... + 222925.

It is an arithmetic number, because the mean of its divisors is an integer number (17598751).

Almost surely, 2^69949309 is an apocalyptic number.

It is an amenable number.

69949309 is a deficient number, since it is larger than the sum of its proper divisors (445695).

69949309 is a wasteful number, since it uses less digits than its factorization.

69949309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445694.

The product of its (nonzero) digits is 472392, while the sum is 49.

The square root of 69949309 is about 8363.5703500359. The cubic root of 69949309 is about 412.0290240181.

The spelling of 69949309 in words is "sixty-nine million, nine hundred forty-nine thousand, three hundred nine".