69139225 has 9 divisors (see below), whose sum is σ = 85784223. Its totient is φ = 55278120.

The previous prime is 69139223. The next prime is 69139229. The reversal of 69139225 is 52293196.

The square root of 69139225 is 8315.

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

It can be written as a sum of positive squares in only one way, i.e., 24890121 + 44249104 = 4989^2 + 6652^2 .

It is not a de Polignac number, because 69139225 - 2¹ = 69139223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69139223) 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, 40744 + ... + 42406.

Almost surely, 2^69139225 is an apocalyptic number.

69139225 is the 8315-th square number.

69139225 is the 4158-th centered octagonal number.

It is an amenable number.

69139225 is a deficient number, since it is larger than the sum of its proper divisors (16644998).

69139225 is an frugal number, since it uses more digits than its factorization.

69139225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336 (or 1668 counting only the distinct ones).

The product of its digits is 29160, while the sum is 37.

The cubic root of 69139225 is about 410.4322726193.

The spelling of 69139225 in words is "sixty-nine million, one hundred thirty-nine thousand, two hundred twenty-five".