69999887 has 4 divisors (see below), whose sum is σ = 70419216. Its totient is φ = 69580560.

The previous prime is 69999877. The next prime is 69999899. The reversal of 69999887 is 78899996.

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 69999887 - 2⁴ = 69999871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69999877) 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, 209414 + ... + 209747.

It is an arithmetic number, because the mean of its divisors is an integer number (17604804).

Almost surely, 2^69999887 is an apocalyptic number.

69999887 is a deficient number, since it is larger than the sum of its proper divisors (419329).

69999887 is a wasteful number, since it uses less digits than its factorization.

69999887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419328.

The product of its digits is 17635968, while the sum is 65.

The square root of 69999887 is about 8366.5935122964. The cubic root of 69999887 is about 412.1283082163.

The spelling of 69999887 in words is "sixty-nine million, nine hundred ninety-nine thousand, eight hundred eighty-seven".