69978565 has 8 divisors (see below), whose sum is σ = 84068640. Its totient is φ = 55919952.

The previous prime is 69978553. The next prime is 69978583. The reversal of 69978565 is 56587996.

It is a happy number.

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 69978565 - 2⁹ = 69978053 is a prime.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 2655 + ... + 12124.

It is an arithmetic number, because the mean of its divisors is an integer number (10508580).

Almost surely, 2^69978565 is an apocalyptic number.

It is an amenable number.

69978565 is a deficient number, since it is larger than the sum of its proper divisors (14090075).

69978565 is a wasteful number, since it uses less digits than its factorization.

69978565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15731.

The product of its digits is 4082400, while the sum is 55.

The square root of 69978565 is about 8365.3191809996. The cubic root of 69978565 is about 412.0864591385.

The spelling of 69978565 in words is "sixty-nine million, nine hundred seventy-eight thousand, five hundred sixty-five".