69742909 has 2 divisors, whose sum is σ = 69742910. Its totient is φ = 69742908.

The previous prime is 69742889. The next prime is 69742919. The reversal of 69742909 is 90924796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58951684 + 10791225 = 7678^2 + 3285^2 .

It is a cyclic number.

It is not a de Polignac number, because 69742909 - 2⁷ = 69742781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69742919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34871454 + 34871455.

It is an arithmetic number, because the mean of its divisors is an integer number (34871455).

Almost surely, 2^69742909 is an apocalyptic number.

It is an amenable number.

69742909 is a deficient number, since it is larger than the sum of its proper divisors (1).

69742909 is an equidigital number, since it uses as much as digits as its factorization.

69742909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 69742909 is about 8351.2220063892. Note that the first 3 decimals coincide. The cubic root of 69742909 is about 411.6233656223.

The spelling of 69742909 in words is "sixty-nine million, seven hundred forty-two thousand, nine hundred nine".