69399289 has 4 divisors (see below), whose sum is σ = 70013556. Its totient is φ = 68785024.

The previous prime is 69399271. The next prime is 69399301. The reversal of 69399289 is 98299396.

69399289 = 727² + 728² + ... + 839².

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 4032064 + 65367225 = 2008^2 + 8085^2 .

It is a cyclic number.

It is not a de Polignac number, because 69399289 - 2²³ = 61010681 is a prime.

It is a super-2 number, since 2×69399289² = 9632522627411042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69399259) 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, 306964 + ... + 307189.

It is an arithmetic number, because the mean of its divisors is an integer number (17503389).

Almost surely, 2^69399289 is an apocalyptic number.

It is an amenable number.

69399289 is a deficient number, since it is larger than the sum of its proper divisors (614267).

69399289 is a wasteful number, since it uses less digits than its factorization.

69399289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614266.

The product of its digits is 1889568, while the sum is 55.

The square root of 69399289 is about 8330.6235660964. The cubic root of 69399289 is about 410.9462360829.

The spelling of 69399289 in words is "sixty-nine million, three hundred ninety-nine thousand, two hundred eighty-nine".