69438889 has 9 divisors (see below), whose sum is σ = 75308709. Its totient is φ = 63997440.

The previous prime is 69438883. The next prime is 69438907. The reversal of 69438889 is 98883496.

The square root of 69438889 is 8333.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 416025 + 69022864 = 645^2 + 8308^2 .

It is not a de Polignac number, because 69438889 - 2¹¹ = 69436841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69438883) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 108009 + ... + 108649.

Almost surely, 2^69438889 is an apocalyptic number.

69438889 is the 8333-rd square number.

69438889 is the 4167-th centered octagonal number.

It is an amenable number.

69438889 is a deficient number, since it is larger than the sum of its proper divisors (5869820).

69438889 is an frugal number, since it uses more digits than its factorization.

69438889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308 (or 654 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The cubic root of 69438889 is about 411.0243847061.

Multiplying 69438889 by its product of digits (2985984), we get a square (207343411531776 = 14399424²).

The spelling of 69438889 in words is "sixty-nine million, four hundred thirty-eight thousand, eight hundred eighty-nine".