83901905 has 4 divisors (see below), whose sum is σ = 100682292. Its totient is φ = 67121520.

The previous prime is 83901887. The next prime is 83901931. The reversal of 83901905 is 50910938.

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 63552784 + 20349121 = 7972^2 + 4511^2 .

It is not a de Polignac number, because 83901905 - 2¹⁰ = 83900881 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, 8390186 + ... + 8390195.

It is an arithmetic number, because the mean of its divisors is an integer number (25170573).

Almost surely, 2^83901905 is an apocalyptic number.

It is an amenable number.

83901905 is a deficient number, since it is larger than the sum of its proper divisors (16780387).

83901905 is a wasteful number, since it uses less digits than its factorization.

83901905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16780386.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 83901905 is about 9159.7983056397. The cubic root of 83901905 is about 437.7813678496.

The spelling of 83901905 in words is "eighty-three million, nine hundred one thousand, nine hundred five".