69145709 has 2 divisors, whose sum is σ = 69145710. Its totient is φ = 69145708.

The previous prime is 69145691. The next prime is 69145729. The reversal of 69145709 is 90754196.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48260809 + 20884900 = 6947^2 + 4570^2 .

It is a cyclic number.

It is not a de Polignac number, because 69145709 - 2¹⁶ = 69080173 is a prime.

It is a super-2 number, since 2×69145709² = 9562258146225362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69145729) 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, 34572854 + 34572855.

It is an arithmetic number, because the mean of its divisors is an integer number (34572855).

Almost surely, 2^69145709 is an apocalyptic number.

It is an amenable number.

69145709 is a deficient number, since it is larger than the sum of its proper divisors (1).

69145709 is an equidigital number, since it uses as much as digits as its factorization.

69145709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 69145709 is about 8315.3898886342. The cubic root of 69145709 is about 410.4451025754.

The spelling of 69145709 in words is "sixty-nine million, one hundred forty-five thousand, seven hundred nine".