39810993 has 4 divisors (see below), whose sum is σ = 53081328. Its totient is φ = 26540660.

The previous prime is 39810989. The next prime is 39811019. The reversal of 39810993 is 39901893.

It is a happy number.

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 39810993 - 2² = 39810989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39810983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6635163 + ... + 6635168.

It is an arithmetic number, because the mean of its divisors is an integer number (13270332).

Almost surely, 2^39810993 is an apocalyptic number.

It is an amenable number.

39810993 is a deficient number, since it is larger than the sum of its proper divisors (13270335).

39810993 is a wasteful number, since it uses less digits than its factorization.

39810993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13270334.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 39810993 is about 6309.5953119039. The cubic root of 39810993 is about 341.4556763035.

The spelling of 39810993 in words is "thirty-nine million, eight hundred ten thousand, nine hundred ninety-three".