39897407 has 8 divisors (see below), whose sum is σ = 44451072. Its totient is φ = 35498200.

The previous prime is 39897401. The next prime is 39897409. The reversal of 39897407 is 70479893.

39897407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 39897407 - 2⁴ = 39897391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39897401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38069 + ... + 39102.

It is an arithmetic number, because the mean of its divisors is an integer number (5556384).

Almost surely, 2^39897407 is an apocalyptic number.

39897407 is a deficient number, since it is larger than the sum of its proper divisors (4553665).

39897407 is a wasteful number, since it uses less digits than its factorization.

39897407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77229.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 39897407 is about 6316.4394242326. The cubic root of 39897407 is about 341.7025530685.

It can be divided in two parts, 39897 and 407, that added together give a palindrome (40304).

The spelling of 39897407 in words is "thirty-nine million, eight hundred ninety-seven thousand, four hundred seven".