101963905 has 4 divisors (see below), whose sum is σ = 122356692. Its totient is φ = 81571120.

The previous prime is 101963839. The next prime is 101963959. The reversal of 101963905 is 509369101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21538881 + 80425024 = 4641^2 + 8968^2 .

It is not a de Polignac number, because 101963905 - 2⁷ = 101963777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10196386 + ... + 10196395.

It is an arithmetic number, because the mean of its divisors is an integer number (30589173).

Almost surely, 2^101963905 is an apocalyptic number.

It is an amenable number.

101963905 is a deficient number, since it is larger than the sum of its proper divisors (20392787).

101963905 is an equidigital number, since it uses as much as digits as its factorization.

101963905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20392786.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 101963905 is about 10097.7178114661. The cubic root of 101963905 is about 467.1777527039.

The spelling of 101963905 in words is "one hundred one million, nine hundred sixty-three thousand, nine hundred five".