139106020403 has 4 divisors (see below), whose sum is σ = 158978309040. Its totient is φ = 119233731768.

The previous prime is 139106020399. The next prime is 139106020441. The reversal of 139106020403 is 304020601931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304020601931 = 150583 ⋅2018957.

It is a cyclic number.

It is not a de Polignac number, because 139106020403 - 2² = 139106020399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139106020303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9936144308 + ... + 9936144321.

It is an arithmetic number, because the mean of its divisors is an integer number (39744577260).

Almost surely, 2^139106020403 is an apocalyptic number.

139106020403 is a deficient number, since it is larger than the sum of its proper divisors (19872288637).

139106020403 is an equidigital number, since it uses as much as digits as its factorization.

139106020403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19872288636.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 139106020403 in words is "one hundred thirty-nine billion, one hundred six million, twenty thousand, four hundred three".