1912238065 has 16 divisors (see below), whose sum is σ = 2339042256. Its totient is φ = 1500364800.

The previous prime is 1912238051. The next prime is 1912238117. The reversal of 1912238065 is 5608322191.

It can be written as a sum of positive squares in 8 ways, for example, as 430604001 + 1481634064 = 20751^2 + 38492^2 .

It is not a de Polignac number, because 1912238065 - 2⁷ = 1912237937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98785 + ... + 116545.

It is an arithmetic number, because the mean of its divisors is an integer number (146190141).

Almost surely, 2^1912238065 is an apocalyptic number.

It is an amenable number.

1912238065 is a deficient number, since it is larger than the sum of its proper divisors (426804191).

1912238065 is a wasteful number, since it uses less digits than its factorization.

1912238065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18180.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1912238065 is about 43729.1443433324. The cubic root of 1912238065 is about 1241.2158697062.

The spelling of 1912238065 in words is "one billion, nine hundred twelve million, two hundred thirty-eight thousand, sixty-five".