139129893 has 48 divisors (see below), whose sum is σ = 239855616. Its totient is φ = 78945840.

The previous prime is 139129877. The next prime is 139129901. The reversal of 139129893 is 398921931.

It is a happy number.

It is not a de Polignac number, because 139129893 - 2⁴ = 139129877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139129693) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 447208 + ... + 447518.

It is an arithmetic number, because the mean of its divisors is an integer number (4996992).

Almost surely, 2^139129893 is an apocalyptic number.

It is an amenable number.

139129893 is a deficient number, since it is larger than the sum of its proper divisors (100725723).

139129893 is an equidigital number, since it uses as much as digits as its factorization.

139129893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 584 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 139129893 is about 11795.3335264417. Note that the first 3 decimals coincide. The cubic root of 139129893 is about 518.1714535575.

The spelling of 139129893 in words is "one hundred thirty-nine million, one hundred twenty-nine thousand, eight hundred ninety-three".