69840961 has 4 divisors (see below), whose sum is σ = 72249300. Its totient is φ = 67432624.

The previous prime is 69840899. The next prime is 69840997. The reversal of 69840961 is 16904896.

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 37748736 + 32092225 = 6144^2 + 5665^2 .

It is a cyclic number.

It is not a de Polignac number, because 69840961 - 2¹¹ = 69838913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69840361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204126 + ... + 1204183.

It is an arithmetic number, because the mean of its divisors is an integer number (18062325).

Almost surely, 2^69840961 is an apocalyptic number.

It is an amenable number.

69840961 is a deficient number, since it is larger than the sum of its proper divisors (2408339).

69840961 is a wasteful number, since it uses less digits than its factorization.

69840961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408338.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 69840961 is about 8357.0904625952. The cubic root of 69840961 is about 411.8161765963.

The spelling of 69840961 in words is "sixty-nine million, eight hundred forty thousand, nine hundred sixty-one".