69138925 has 12 divisors (see below), whose sum is σ = 87139636. Its totient is φ = 54403200.

The previous prime is 69138919. The next prime is 69138947. The reversal of 69138925 is 52983196.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7767369 + 61371556 = 2787^2 + 7834^2 .

It is not a de Polignac number, because 69138925 - 2⁹ = 69138413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21144 + ... + 24193.

Almost surely, 2^69138925 is an apocalyptic number.

It is an amenable number.

69138925 is a deficient number, since it is larger than the sum of its proper divisors (18000711).

69138925 is a wasteful number, since it uses less digits than its factorization.

69138925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45408 (or 45403 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 69138925 is about 8314.9819602931. The cubic root of 69138925 is about 410.4316789868.

The spelling of 69138925 in words is "sixty-nine million, one hundred thirty-eight thousand, nine hundred twenty-five".