139285293 has 24 divisors (see below), whose sum is σ = 217397088. Its totient is φ = 79089696.

The previous prime is 139285291. The next prime is 139285339. The reversal of 139285293 is 392582931.

It is not a de Polignac number, because 139285293 - 2¹ = 139285291 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139285291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21055 + ... + 26867.

It is an arithmetic number, because the mean of its divisors is an integer number (9058212).

Almost surely, 2^139285293 is an apocalyptic number.

It is an amenable number.

139285293 is a deficient number, since it is larger than the sum of its proper divisors (78111795).

139285293 is a wasteful number, since it uses less digits than its factorization.

139285293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5993 (or 5986 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 139285293 is about 11801.9190388682. The cubic root of 139285293 is about 518.3643042349.

The spelling of 139285293 in words is "one hundred thirty-nine million, two hundred eighty-five thousand, two hundred ninety-three".