39993471 has 12 divisors (see below), whose sum is σ = 66021072. Its totient is φ = 22853376.

The previous prime is 39993463. The next prime is 39993493. The reversal of 39993471 is 17439993.

39993471 is a `hidden beast` number, since 3 + 99 + 93 + 471 = 666.

It is not a de Polignac number, because 39993471 - 2³ = 39993463 is a prime.

It is a super-3 number, since 3×39993471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39993431) 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, 317346 + ... + 317471.

It is an arithmetic number, because the mean of its divisors is an integer number (5501756).

Almost surely, 2^39993471 is an apocalyptic number.

39993471 is a deficient number, since it is larger than the sum of its proper divisors (26027601).

39993471 is a wasteful number, since it uses less digits than its factorization.

39993471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634830 (or 634827 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 39993471 is about 6324.0391365013. The cubic root of 39993471 is about 341.9765809346.

The spelling of 39993471 in words is "thirty-nine million, nine hundred ninety-three thousand, four hundred seventy-one".