139539375 has 40 divisors (see below), whose sum is σ = 258354800. Its totient is φ = 74412000.

The previous prime is 139539373. The next prime is 139539377. The reversal of 139539375 is 573935931.

139539375 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139539373) and next prime (139539377).

It is not a de Polignac number, because 139539375 - 2¹ = 139539373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 139539375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139539373) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12741 + ... + 21009.

It is an arithmetic number, because the mean of its divisors is an integer number (6458870).

Almost surely, 2^139539375 is an apocalyptic number.

139539375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139539375 is a deficient number, since it is larger than the sum of its proper divisors (118815425).

139539375 is an frugal number, since it uses more digits than its factorization.

139539375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8298 (or 8277 counting only the distinct ones).

The product of its digits is 382725, while the sum is 45.

The square root of 139539375 is about 11812.6785700788. The cubic root of 139539375 is about 518.6793100559.

The spelling of 139539375 in words is "one hundred thirty-nine million, five hundred thirty-nine thousand, three hundred seventy-five".