3994729924437 has 96 divisors (see below), whose sum is σ = 6843896643584. Its totient is φ = 2197189670400.

The previous prime is 3994729924399. The next prime is 3994729924447. The reversal of 3994729924437 is 7344299274993.

It is a happy number.

3994729924437 is a `hidden beast` number, since 3 + 9 + 9 + 472 + 99 + 24 + 43 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-3994729924437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994729924447) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 291984237 + ... + 291997917.

Almost surely, 2^{3994729924437} is an apocalyptic number.

It is an amenable number.

3994729924437 is a deficient number, since it is larger than the sum of its proper divisors (2849166719147).

3994729924437 is a wasteful number, since it uses less digits than its factorization.

3994729924437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14519 (or 14516 counting only the distinct ones).

The product of its digits is 740710656, while the sum is 72.

The spelling of 3994729924437 in words is "three trillion, nine hundred ninety-four billion, seven hundred twenty-nine million, nine hundred twenty-four thousand, four hundred thirty-seven".