69988521 has 8 divisors (see below), whose sum is σ = 93709440. Its totient is φ = 46463312.

The previous prime is 69988519. The next prime is 69988561. The reversal of 69988521 is 12588996.

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 69988521 - 2¹ = 69988519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (69988511) by changing a digit.

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, 48090 + ... + 49523.

It is an arithmetic number, because the mean of its divisors is an integer number (11713680).

Almost surely, 2^69988521 is an apocalyptic number.

It is an amenable number.

69988521 is a deficient number, since it is larger than the sum of its proper divisors (23720919).

69988521 is a wasteful number, since it uses less digits than its factorization.

69988521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97855.

The product of its digits is 311040, while the sum is 48.

The square root of 69988521 is about 8365.9142357545. The cubic root of 69988521 is about 412.1060010189.

The spelling of 69988521 in words is "sixty-nine million, nine hundred eighty-eight thousand, five hundred twenty-one".