103139813661 has 4 divisors (see below), whose sum is σ = 137519751552. Its totient is φ = 68759875772.

The previous prime is 103139813641. The next prime is 103139813663. The reversal of 103139813661 is 166318931301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 103139813661 - 2¹⁰ = 103139812637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103139813663) 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, 17189968941 + ... + 17189968946.

It is an arithmetic number, because the mean of its divisors is an integer number (34379937888).

Almost surely, 2^103139813661 is an apocalyptic number.

It is an amenable number.

103139813661 is a deficient number, since it is larger than the sum of its proper divisors (34379937891).

103139813661 is an equidigital number, since it uses as much as digits as its factorization.

103139813661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34379937890.

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 103139813661 in words is "one hundred three billion, one hundred thirty-nine million, eight hundred thirteen thousand, six hundred sixty-one".