69879889 has 4 divisors (see below), whose sum is σ = 70145856. Its totient is φ = 69613924.

The previous prime is 69879869. The next prime is 69879899. The reversal of 69879889 is 98897896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 69879889 - 2⁵ = 69879857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69879889.

It is not an unprimeable number, because it can be changed into a prime (69879829) 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, 132589 + ... + 133114.

It is an arithmetic number, because the mean of its divisors is an integer number (17536464).

Almost surely, 2^69879889 is an apocalyptic number.

It is an amenable number.

69879889 is a deficient number, since it is larger than the sum of its proper divisors (265967).

69879889 is a wasteful number, since it uses less digits than its factorization.

69879889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265966.

The product of its digits is 15676416, while the sum is 64.

The square root of 69879889 is about 8359.4191783879. The cubic root of 69879889 is about 411.8926751740.

The spelling of 69879889 in words is "sixty-nine million, eight hundred seventy-nine thousand, eight hundred eighty-nine".