69520769 has 8 divisors (see below), whose sum is σ = 73713960. Its totient is φ = 65339136.

The previous prime is 69520757. The next prime is 69520771. The reversal of 69520769 is 96702596.

It can be written as a sum of positive squares in 4 ways, for example, as 14938225 + 54582544 = 3865^2 + 7388^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 69520769 - 2¹⁶ = 69455233 is a prime.

It is a super-2 number, since 2×69520769² = 9666274644702722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69520729) 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, 11627 + ... + 16559.

It is an arithmetic number, because the mean of its divisors is an integer number (9214245).

Almost surely, 2^69520769 is an apocalyptic number.

It is an amenable number.

69520769 is a deficient number, since it is larger than the sum of its proper divisors (4193191).

69520769 is a wasteful number, since it uses less digits than its factorization.

69520769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 69520769 is about 8337.9115490631. The cubic root of 69520769 is about 411.1858766194.

The spelling of 69520769 in words is "sixty-nine million, five hundred twenty thousand, seven hundred sixty-nine".