3923318641 has 12 divisors (see below), whose sum is σ = 4351986100. Its totient is φ = 3533919840.

The previous prime is 3923318629. The next prime is 3923318653. The reversal of 3923318641 is 1468133293.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3923318629) and next prime (3923318653).

It can be written as a sum of positive squares in 2 ways, for example, as 1402877025 + 2520441616 = 37455^2 + 50204^2 .

It is not a de Polignac number, because 3923318641 - 2¹³ = 3923310449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3923318594 and 3923318603.

It is not an unprimeable number, because it can be changed into a prime (3923318681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135546 + ... + 161923.

Almost surely, 2^3923318641 is an apocalyptic number.

It is an amenable number.

3923318641 is a deficient number, since it is larger than the sum of its proper divisors (428667459).

3923318641 is a wasteful number, since it uses less digits than its factorization.

3923318641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297600 (or 297589 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 3923318641 is about 62636.4002876921. The cubic root of 3923318641 is about 1577.1918609715.

The spelling of 3923318641 in words is "three billion, nine hundred twenty-three million, three hundred eighteen thousand, six hundred forty-one".