39090391 has 8 divisors (see below), whose sum is σ = 41846400. Its totient is φ = 36404280.

The previous prime is 39090383. The next prime is 39090419. The reversal of 39090391 is 19309093.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39090391 - 2³ = 39090383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39090371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16315 + ... + 18556.

It is an arithmetic number, because the mean of its divisors is an integer number (5230800).

Almost surely, 2^39090391 is an apocalyptic number.

39090391 is a deficient number, since it is larger than the sum of its proper divisors (2756009).

39090391 is a wasteful number, since it uses less digits than its factorization.

39090391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34949.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 39090391 is about 6252.2308818533. The cubic root of 39090391 is about 339.3829378719.

The spelling of 39090391 in words is "thirty-nine million, ninety thousand, three hundred ninety-one".