3984777901 has 4 divisors (see below), whose sum is σ = 4291299292. Its totient is φ = 3678256512.

The previous prime is 3984777893. The next prime is 3984777919. The reversal of 3984777901 is 1097774893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1097774893 = 739 ⋅1485487.

It can be written as a sum of positive squares in 2 ways, for example, as 798062500 + 3186715401 = 28250^2 + 56451^2 .

It is a cyclic number.

It is not a de Polignac number, because 3984777901 - 2³ = 3984777893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3984777701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153260676 + ... + 153260701.

It is an arithmetic number, because the mean of its divisors is an integer number (1072824823).

Almost surely, 2^3984777901 is an apocalyptic number.

It is an amenable number.

3984777901 is a deficient number, since it is larger than the sum of its proper divisors (306521391).

3984777901 is a wasteful number, since it uses less digits than its factorization.

3984777901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306521390.

The product of its (nonzero) digits is 2667168, while the sum is 55.

The square root of 3984777901 is about 63125.0972355687. The cubic root of 3984777901 is about 1585.3848609158.

The spelling of 3984777901 in words is "three billion, nine hundred eighty-four million, seven hundred seventy-seven thousand, nine hundred one".