103831193891 has 2 divisors, whose sum is σ = 103831193892. Its totient is φ = 103831193890.

The previous prime is 103831193887. The next prime is 103831193941. The reversal of 103831193891 is 198391138301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 103831193891 - 2² = 103831193887 is a prime.

It is not a weakly prime, because it can be changed into another prime (103831190891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51915596945 + 51915596946.

It is an arithmetic number, because the mean of its divisors is an integer number (51915596946).

Almost surely, 2^103831193891 is an apocalyptic number.

103831193891 is a deficient number, since it is larger than the sum of its proper divisors (1).

103831193891 is an equidigital number, since it uses as much as digits as its factorization.

103831193891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 103831193891 in words is "one hundred three billion, eight hundred thirty-one million, one hundred ninety-three thousand, eight hundred ninety-one".