39887473 has 4 divisors (see below), whose sum is σ = 40541428. Its totient is φ = 39233520.

The previous prime is 39887461. The next prime is 39887489. The reversal of 39887473 is 37478893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37478893 = 173 ⋅216641.

It can be written as a sum of positive squares in 2 ways, for example, as 13601344 + 26286129 = 3688^2 + 5127^2 .

It is a cyclic number.

It is not a de Polignac number, because 39887473 - 2⁹ = 39886961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39887453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326886 + ... + 327007.

It is an arithmetic number, because the mean of its divisors is an integer number (10135357).

Almost surely, 2^39887473 is an apocalyptic number.

It is an amenable number.

39887473 is a deficient number, since it is larger than the sum of its proper divisors (653955).

39887473 is an equidigital number, since it uses as much as digits as its factorization.

39887473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653954.

The product of its digits is 1016064, while the sum is 49.

The square root of 39887473 is about 6315.6530145346. The cubic root of 39887473 is about 341.6741906995.

The spelling of 39887473 in words is "thirty-nine million, eight hundred eighty-seven thousand, four hundred seventy-three".