101939 has 2 divisors, whose sum is σ = 101940. Its totient is φ = 101938.

The previous prime is 101929. The next prime is 101957. The reversal of 101939 is 939101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101939 - 2¹² = 97843 is a prime.

It is a Chen prime.

It is equal to p₉₇₆₁ and since 101939 and 9761 have the same sum of digits, it is a Honaker prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (101929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50969 + 50970.

It is an arithmetic number, because the mean of its divisors is an integer number (50970).

2¹⁰¹⁹³⁹ is an apocalyptic number.

101939 is a deficient number, since it is larger than the sum of its proper divisors (1).

101939 is an equidigital number, since it uses as much as digits as its factorization.

101939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 101939 is about 319.2788749667. The cubic root of 101939 is about 46.7139713068.

The spelling of 101939 in words is "one hundred one thousand, nine hundred thirty-nine".