40139394103 has 4 divisors (see below), whose sum is σ = 40201434000. Its totient is φ = 40077354208.

The previous prime is 40139394079. The next prime is 40139394107. The reversal of 40139394103 is 30149393104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40139394103 - 2²¹ = 40137296951 is a prime.

It is a super-2 number, since 2×40139394103² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40139394107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31018978 + ... + 31020271.

It is an arithmetic number, because the mean of its divisors is an integer number (10050358500).

Almost surely, 2^40139394103 is an apocalyptic number.

40139394103 is a deficient number, since it is larger than the sum of its proper divisors (62039897).

40139394103 is an equidigital number, since it uses as much as digits as its factorization.

40139394103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62039896.

The product of its (nonzero) digits is 34992, while the sum is 37.

Subtracting from 40139394103 its reverse (30149393104), we obtain a palindrome (9990000999).

The spelling of 40139394103 in words is "forty billion, one hundred thirty-nine million, three hundred ninety-four thousand, one hundred three".