103139831 has 8 divisors (see below), whose sum is σ = 106102080. Its totient is φ = 100186848.

The previous prime is 103139819. The next prime is 103139857. The reversal of 103139831 is 138931301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103139831 is a prime.

It is a super-2 number, since 2×103139831² = 21275649477417122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103139794 and 103139803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103139801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24665 + ... + 28541.

It is an arithmetic number, because the mean of its divisors is an integer number (13262760).

Almost surely, 2^103139831 is an apocalyptic number.

103139831 is a deficient number, since it is larger than the sum of its proper divisors (2962249).

103139831 is an equidigital number, since it uses as much as digits as its factorization.

103139831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 103139831 is about 10155.7782075034. The cubic root of 103139831 is about 468.9668432938.

The spelling of 103139831 in words is "one hundred three million, one hundred thirty-nine thousand, eight hundred thirty-one".