39781093 has 4 divisors (see below), whose sum is σ = 43397568. Its totient is φ = 36164620.

The previous prime is 39781081. The next prime is 39781097. The reversal of 39781093 is 39018793.

39781093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39018793 = 11 ⋅3547163.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39781093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39781097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1808221 + ... + 1808242.

It is an arithmetic number, because the mean of its divisors is an integer number (10849392).

Almost surely, 2^39781093 is an apocalyptic number.

It is an amenable number.

39781093 is a deficient number, since it is larger than the sum of its proper divisors (3616475).

39781093 is a wasteful number, since it uses less digits than its factorization.

39781093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616474.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 39781093 is about 6307.2254597406. The cubic root of 39781093 is about 341.3701715977.

The spelling of 39781093 in words is "thirty-nine million, seven hundred eighty-one thousand, ninety-three".