139473553 has 8 divisors (see below), whose sum is σ = 142879968. Its totient is φ = 136074624.

The previous prime is 139473517. The next prime is 139473569. The reversal of 139473553 is 355374931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139473553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139473353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60225 + ... + 62497.

It is an arithmetic number, because the mean of its divisors is an integer number (17859996).

Almost surely, 2^139473553 is an apocalyptic number.

It is an amenable number.

139473553 is a deficient number, since it is larger than the sum of its proper divisors (3406415).

139473553 is a wasteful number, since it uses less digits than its factorization.

139473553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743.

The product of its digits is 170100, while the sum is 40.

The square root of 139473553 is about 11809.8921671622. The cubic root of 139473553 is about 518.5977419703.

It can be divided in two parts, 1394 and 73553, that added together give a palindrome (74947).

The spelling of 139473553 in words is "one hundred thirty-nine million, four hundred seventy-three thousand, five hundred fifty-three".