139929855 has 16 divisors (see below), whose sum is σ = 241110240. Its totient is φ = 68888448.

The previous prime is 139929841. The next prime is 139929859. The reversal of 139929855 is 558929931.

It is not a de Polignac number, because 139929855 - 2⁹ = 139929343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139929798 and 139929807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139929859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358600 + ... + 358989.

It is an arithmetic number, because the mean of its divisors is an integer number (15069390).

Almost surely, 2^139929855 is an apocalyptic number.

139929855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139929855 is a deficient number, since it is larger than the sum of its proper divisors (101180385).

139929855 is a wasteful number, since it uses less digits than its factorization.

139929855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717610.

The product of its digits is 874800, while the sum is 51.

The square root of 139929855 is about 11829.1950275579. The cubic root of 139929855 is about 519.1626748646.

The spelling of 139929855 in words is "one hundred thirty-nine million, nine hundred twenty-nine thousand, eight hundred fifty-five".