69979249 has 2 divisors, whose sum is σ = 69979250. Its totient is φ = 69979248.

The previous prime is 69979243. The next prime is 69979279. The reversal of 69979249 is 94297996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67354849 + 2624400 = 8207^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 69979249 - 2⁹ = 69978737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69979249.

It is not a weakly prime, because it can be changed into another prime (69979243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34989624 + 34989625.

It is an arithmetic number, because the mean of its divisors is an integer number (34989625).

Almost surely, 2^69979249 is an apocalyptic number.

It is an amenable number.

69979249 is a deficient number, since it is larger than the sum of its proper divisors (1).

69979249 is an equidigital number, since it uses as much as digits as its factorization.

69979249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 55.

The square root of 69979249 is about 8365.3600639781. The cubic root of 69979249 is about 412.0878017697.

The spelling of 69979249 in words is "sixty-nine million, nine hundred seventy-nine thousand, two hundred forty-nine".