69988407 has 4 divisors (see below), whose sum is σ = 93317880. Its totient is φ = 46658936.

The previous prime is 69988393. The next prime is 69988417. The reversal of 69988407 is 70488996.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 69988407 - 2¹⁰ = 69987383 is a prime.

It is a super-3 number, since 3×69988407³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 69988407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69988417) 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, 11664732 + ... + 11664737.

It is an arithmetic number, because the mean of its divisors is an integer number (23329470).

Almost surely, 2^69988407 is an apocalyptic number.

69988407 is a deficient number, since it is larger than the sum of its proper divisors (23329473).

69988407 is a wasteful number, since it uses less digits than its factorization.

69988407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23329472.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 69988407 is about 8365.9074223900. The cubic root of 69988407 is about 412.1057772674.

The spelling of 69988407 in words is "sixty-nine million, nine hundred eighty-eight thousand, four hundred seven".