3923467681 has 36 divisors (see below), whose sum is σ = 4976615280. Its totient is φ = 3075498720.

The previous prime is 3923467651. The next prime is 3923467687. The reversal of 3923467681 is 1867643293.

3923467681 = T₇₃ + T₇₄ + ... + T₂₈₆₅.

It is not a de Polignac number, because 3923467681 - 2²¹ = 3921370529 is a prime.

It is a super-2 number, since 2×3923467681² = 30787197287703035522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (3923467687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 780466 + ... + 785476.

Almost surely, 2^3923467681 is an apocalyptic number.

It is an amenable number.

3923467681 is a deficient number, since it is larger than the sum of its proper divisors (1053147599).

3923467681 is a wasteful number, since it uses less digits than its factorization.

3923467681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5102 (or 5066 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 3923467681 is about 62637.5899999353. The cubic root of 3923467681 is about 1577.2118323036.

The spelling of 3923467681 in words is "three billion, nine hundred twenty-three million, four hundred sixty-seven thousand, six hundred eighty-one".