139939953 has 8 divisors (see below), whose sum is σ = 186660000. Its totient is φ = 93256608.

The previous prime is 139939949. The next prime is 139939963. The reversal of 139939953 is 359939931.

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

It is not a de Polignac number, because 139939953 - 2² = 139939949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139939896 and 139939905.

It is not an unprimeable number, because it can be changed into a prime (139939913) 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, 1498 + ... + 16796.

It is an arithmetic number, because the mean of its divisors is an integer number (23332500).

Almost surely, 2^139939953 is an apocalyptic number.

It is an amenable number.

139939953 is a deficient number, since it is larger than the sum of its proper divisors (46720047).

139939953 is a wasteful number, since it uses less digits than its factorization.

139939953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18351.

The product of its digits is 885735, while the sum is 51.

The square root of 139939953 is about 11829.6218451817. The cubic root of 139939953 is about 519.1751629754.

The spelling of 139939953 in words is "one hundred thirty-nine million, nine hundred thirty-nine thousand, nine hundred fifty-three".