3946577905 has 4 divisors (see below), whose sum is σ = 4735893492. Its totient is φ = 3157262320.

The previous prime is 3946577867. The next prime is 3946577911. The reversal of 3946577905 is 5097756493.

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 493017616 + 3453560289 = 22204^2 + 58767^2 .

It is not a de Polignac number, because 3946577905 - 2²¹ = 3944480753 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, 394657786 + ... + 394657795.

It is an arithmetic number, because the mean of its divisors is an integer number (1183973373).

Almost surely, 2^3946577905 is an apocalyptic number.

It is an amenable number.

3946577905 is a deficient number, since it is larger than the sum of its proper divisors (789315587).

3946577905 is an equidigital number, since it uses as much as digits as its factorization.

3946577905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789315586.

The product of its (nonzero) digits is 7144200, while the sum is 55.

The square root of 3946577905 is about 62821.7948247262. The cubic root of 3946577905 is about 1580.3024984294.

It can be divided in two parts, 39465 and 77905, that added together give a triangular number (117370 = T₄₈₄).

The spelling of 3946577905 in words is "three billion, nine hundred forty-six million, five hundred seventy-seven thousand, nine hundred five".