139378935 has 16 divisors (see below), whose sum is σ = 223534080. Its totient is φ = 74159520.

The previous prime is 139378933. The next prime is 139378957. The reversal of 139378935 is 539873931.

139378935 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139378935 - 2¹ = 139378933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139378931) 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, 4315 + ... + 17244.

It is an arithmetic number, because the mean of its divisors is an integer number (13970880).

Almost surely, 2^139378935 is an apocalyptic number.

139378935 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139378935 is a deficient number, since it is larger than the sum of its proper divisors (84155145).

139378935 is a wasteful number, since it uses less digits than its factorization.

139378935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21998.

The product of its digits is 612360, while the sum is 48.

The square root of 139378935 is about 11805.8856084582. The cubic root of 139378935 is about 518.4804442694.

The spelling of 139378935 in words is "one hundred thirty-nine million, three hundred seventy-eight thousand, nine hundred thirty-five".