69852139 has 4 divisors (see below), whose sum is σ = 79831024. Its totient is φ = 59873256.

The previous prime is 69852131. The next prime is 69852157. The reversal of 69852139 is 93125896.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 69852139 - 2³ = 69852131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 69852095 and 69852104.

It is not an unprimeable number, because it can be changed into a prime (69852131) 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, 4989432 + ... + 4989445.

It is an arithmetic number, because the mean of its divisors is an integer number (19957756).

Almost surely, 2^69852139 is an apocalyptic number.

69852139 is a deficient number, since it is larger than the sum of its proper divisors (9978885).

69852139 is an equidigital number, since it uses as much as digits as its factorization.

69852139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9978884.

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

The square root of 69852139 is about 8357.7592092618. The cubic root of 69852139 is about 411.8381457273.

The spelling of 69852139 in words is "sixty-nine million, eight hundred fifty-two thousand, one hundred thirty-nine".