69047009 has 2 divisors, whose sum is σ = 69047010. Its totient is φ = 69047008.

The previous prime is 69046981. The next prime is 69047029. The reversal of 69047009 is 90074096.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68973025 + 73984 = 8305^2 + 272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69047009 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69047009.

It is not a weakly prime, because it can be changed into another prime (69047029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34523504 + 34523505.

It is an arithmetic number, because the mean of its divisors is an integer number (34523505).

Almost surely, 2^69047009 is an apocalyptic number.

It is an amenable number.

69047009 is a deficient number, since it is larger than the sum of its proper divisors (1).

69047009 is an equidigital number, since it uses as much as digits as its factorization.

69047009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 69047009 is about 8309.4529904200. The cubic root of 69047009 is about 410.2497170005.

The spelling of 69047009 in words is "sixty-nine million, forty-seven thousand, nine".