139481534 has 8 divisors (see below), whose sum is σ = 209279928. Its totient is φ = 69721560.

The previous prime is 139481533. The next prime is 139481539. The reversal of 139481534 is 435184931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139481533) 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, 2549 + ... + 16895.

It is an arithmetic number, because the mean of its divisors is an integer number (26159991).

Almost surely, 2^139481534 is an apocalyptic number.

139481534 is a deficient number, since it is larger than the sum of its proper divisors (69798394).

139481534 is a wasteful number, since it uses less digits than its factorization.

139481534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19210.

The product of its digits is 51840, while the sum is 38.

The square root of 139481534 is about 11810.2300570311. The cubic root of 139481534 is about 518.6076335699.

It can be divided in two parts, 1394 and 81534, that added together give a palindrome (82928).

The spelling of 139481534 in words is "one hundred thirty-nine million, four hundred eighty-one thousand, five hundred thirty-four".