69220645 has 8 divisors (see below), whose sum is σ = 89454456. Its totient is φ = 51116736.

The previous prime is 69220633. The next prime is 69220649. The reversal of 69220645 is 54602296.

69220645 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 4 ways, for example, as 9529569 + 59691076 = 3087^2 + 7726^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69220645 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69220645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69220649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532402 + ... + 532531.

It is an arithmetic number, because the mean of its divisors is an integer number (11181807).

Almost surely, 2^69220645 is an apocalyptic number.

69220645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

69220645 is a deficient number, since it is larger than the sum of its proper divisors (20233811).

69220645 is a wasteful number, since it uses less digits than its factorization.

69220645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064951.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 69220645 is about 8319.8945305815. The cubic root of 69220645 is about 410.5933210280.

The spelling of 69220645 in words is "sixty-nine million, two hundred twenty thousand, six hundred forty-five".