3812007985 has 4 divisors (see below), whose sum is σ = 4574409588. Its totient is φ = 3049606384.

The previous prime is 3812007973. The next prime is 3812008003. The reversal of 3812007985 is 5897002183.

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 758671936 + 3053336049 = 27544^2 + 55257^2 .

It is a cyclic number.

It is not a de Polignac number, because 3812007985 - 2²³ = 3803619377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381200794 + ... + 381200803.

It is an arithmetic number, because the mean of its divisors is an integer number (1143602397).

Almost surely, 2^3812007985 is an apocalyptic number.

It is an amenable number.

3812007985 is a deficient number, since it is larger than the sum of its proper divisors (762401603).

3812007985 is an equidigital number, since it uses as much as digits as its factorization.

3812007985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762401602.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 3812007985 is about 61741.4608265791. The cubic root of 3812007985 is about 1562.1327372343.

The spelling of 3812007985 in words is "three billion, eight hundred twelve million, seven thousand, nine hundred eighty-five".