69812065 has 4 divisors (see below), whose sum is σ = 83774484. Its totient is φ = 55849648.

The previous prime is 69812059. The next prime is 69812089. The reversal of 69812065 is 56021896.

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 43771456 + 26040609 = 6616^2 + 5103^2 .

It is a cyclic number.

It is not a de Polignac number, because 69812065 - 2¹¹ = 69810017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 6981202 + ... + 6981211.

It is an arithmetic number, because the mean of its divisors is an integer number (20943621).

Almost surely, 2^69812065 is an apocalyptic number.

It is an amenable number.

69812065 is a deficient number, since it is larger than the sum of its proper divisors (13962419).

69812065 is a wasteful number, since it uses less digits than its factorization.

69812065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13962418.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 69812065 is about 8355.3614523849. The cubic root of 69812065 is about 411.7593738185.

It can be divided in two parts, 6981 and 2065, that multiplied together give a triangular number (14415765 = T₅₃₆₉).

The spelling of 69812065 in words is "sixty-nine million, eight hundred twelve thousand, sixty-five".