69889129 has 4 divisors (see below), whose sum is σ = 69918676. Its totient is φ = 69859584.

The previous prime is 69889123. The next prime is 69889177. The reversal of 69889129 is 92198896.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45158400 + 24730729 = 6720^2 + 4973^2 .

It is a cyclic number.

It is not a de Polignac number, because 69889129 - 2³ = 69889121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69889121) 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, 10884 + ... + 16069.

It is an arithmetic number, because the mean of its divisors is an integer number (17479669).

Almost surely, 2^69889129 is an apocalyptic number.

It is an amenable number.

69889129 is a deficient number, since it is larger than the sum of its proper divisors (29547).

69889129 is a wasteful number, since it uses less digits than its factorization.

69889129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29546.

The product of its digits is 559872, while the sum is 52.

The square root of 69889129 is about 8359.9718300961. The cubic root of 69889129 is about 411.9108288023.

The spelling of 69889129 in words is "sixty-nine million, eight hundred eighty-nine thousand, one hundred twenty-nine".