138967421935 has 16 divisors (see below), whose sum is σ = 167409815040. Its totient is φ = 110741815840.

The previous prime is 138967421933. The next prime is 138967421951. The reversal of 138967421935 is 539124769831.

It is a happy number.

It is not a de Polignac number, because 138967421935 - 2¹ = 138967421933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138967421935.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138967421933) 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, 2338926 + ... + 2397604.

It is an arithmetic number, because the mean of its divisors is an integer number (10463113440).

Almost surely, 2^138967421935 is an apocalyptic number.

138967421935 is a deficient number, since it is larger than the sum of its proper divisors (28442393105).

138967421935 is a wasteful number, since it uses less digits than its factorization.

138967421935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60518.

The product of its digits is 9797760, while the sum is 58.

The spelling of 138967421935 in words is "one hundred thirty-eight billion, nine hundred sixty-seven million, four hundred twenty-one thousand, nine hundred thirty-five".