69805745 has 4 divisors (see below), whose sum is σ = 83766900. Its totient is φ = 55844592.

The previous prime is 69805741. The next prime is 69805751. The reversal of 69805745 is 54750896.

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 45589504 + 24216241 = 6752^2 + 4921^2 .

It is a cyclic number.

It is not a de Polignac number, because 69805745 - 2² = 69805741 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 69805696 and 69805705.

It is not an unprimeable number, because it can be changed into a prime (69805741) 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 in 3 ways as a sum of consecutive naturals, for example, 6980570 + ... + 6980579.

It is an arithmetic number, because the mean of its divisors is an integer number (20941725).

Almost surely, 2^69805745 is an apocalyptic number.

It is an amenable number.

69805745 is a deficient number, since it is larger than the sum of its proper divisors (13961155).

69805745 is a wasteful number, since it uses less digits than its factorization.

69805745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13961154.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 69805745 is about 8354.9832435499. The cubic root of 69805745 is about 411.7469480877.

The spelling of 69805745 in words is "sixty-nine million, eight hundred five thousand, seven hundred forty-five".