39987353 has 4 divisors (see below), whose sum is σ = 45699840. Its totient is φ = 34274868.

The previous prime is 39987313. The next prime is 39987359. The reversal of 39987353 is 35378993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39987353 - 2⁸ = 39987097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39987298 and 39987307.

It is not an unprimeable number, because it can be changed into a prime (39987359) 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, 2856233 + ... + 2856246.

It is an arithmetic number, because the mean of its divisors is an integer number (11424960).

Almost surely, 2^39987353 is an apocalyptic number.

It is an amenable number.

39987353 is a deficient number, since it is larger than the sum of its proper divisors (5712487).

39987353 is an equidigital number, since it uses as much as digits as its factorization.

39987353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5712486.

The product of its digits is 612360, while the sum is 47.

The square root of 39987353 is about 6323.5554081545. Note that the first 3 decimals coincide. The cubic root of 39987353 is about 341.9591420930.

The spelling of 39987353 in words is "thirty-nine million, nine hundred eighty-seven thousand, three hundred fifty-three".