39383991 has 12 divisors (see below), whose sum is σ = 56946240. Its totient is φ = 26229120.

The previous prime is 39383983. The next prime is 39383999. The reversal of 39383991 is 19938393.

It is an interprime number because it is at equal distance from previous prime (39383983) and next prime (39383999).

It is not a de Polignac number, because 39383991 - 2³ = 39383983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39383999) 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, 11431 + ... + 14471.

It is an arithmetic number, because the mean of its divisors is an integer number (4745520).

Almost surely, 2^39383991 is an apocalyptic number.

39383991 is a deficient number, since it is larger than the sum of its proper divisors (17562249).

39383991 is a wasteful number, since it uses less digits than its factorization.

39383991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486 (or 4483 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 39383991 is about 6275.6665781413. Note that the first 3 decimals coincide. The cubic root of 39383991 is about 340.2304982575.

The spelling of 39383991 in words is "thirty-nine million, three hundred eighty-three thousand, nine hundred ninety-one".