39343987 has 4 divisors (see below), whose sum is σ = 40407376. Its totient is φ = 38280600.

The previous prime is 39343979. The next prime is 39344009. The reversal of 39343987 is 78934393.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39343987 - 2³ = 39343979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39343957) 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, 531639 + ... + 531712.

It is an arithmetic number, because the mean of its divisors is an integer number (10101844).

Almost surely, 2^39343987 is an apocalyptic number.

39343987 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

39343987 is a deficient number, since it is larger than the sum of its proper divisors (1063389).

39343987 is a wasteful number, since it uses less digits than its factorization.

39343987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063388.

The product of its digits is 489888, while the sum is 46.

The square root of 39343987 is about 6272.4785372291. The cubic root of 39343987 is about 340.1152636881.

It can be divided in two parts, 3934 and 3987, that added together give a square (7921 = 89²).

The spelling of 39343987 in words is "thirty-nine million, three hundred forty-three thousand, nine hundred eighty-seven".