39540397 has 8 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 35983920.

The previous prime is 39540373. The next prime is 39540409. The reversal of 39540397 is 79304593.

39540397 is nontrivially palindromic in base 12.

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 39540397 - 2⁷ = 39540269 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 (39540337) 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, 20497 + ... + 22342.

It is an arithmetic number, because the mean of its divisors is an integer number (5397840).

Almost surely, 2^39540397 is an apocalyptic number.

It is an amenable number.

39540397 is a deficient number, since it is larger than the sum of its proper divisors (3642323).

39540397 is a wasteful number, since it uses less digits than its factorization.

39540397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42923.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 39540397 is about 6288.1155364704. The cubic root of 39540397 is about 340.6802901803.

The spelling of 39540397 in words is "thirty-nine million, five hundred forty thousand, three hundred ninety-seven".