39897143 has 8 divisors (see below), whose sum is σ = 46872336. Its totient is φ = 33480000.

The previous prime is 39897097. The next prime is 39897191. The reversal of 39897143 is 34179893.

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 39897143 - 2⁸ = 39896887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39897094 and 39897103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39897043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139358 + ... + 139643.

It is an arithmetic number, because the mean of its divisors is an integer number (5859042).

Almost surely, 2^39897143 is an apocalyptic number.

39897143 is a deficient number, since it is larger than the sum of its proper divisors (6975193).

39897143 is a wasteful number, since it uses less digits than its factorization.

39897143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279025.

The product of its digits is 163296, while the sum is 44.

The square root of 39897143 is about 6316.4185263486. The cubic root of 39897143 is about 341.7017993881.

The spelling of 39897143 in words is "thirty-nine million, eight hundred ninety-seven thousand, one hundred forty-three".