43778713 has 4 divisors (see below), whose sum is σ = 47758608. Its totient is φ = 39798820.

The previous prime is 43778711. The next prime is 43778731. The reversal of 43778713 is 31787734.

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 43778713 - 2¹ = 43778711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43778711) 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, 1989931 + ... + 1989952.

It is an arithmetic number, because the mean of its divisors is an integer number (11939652).

Almost surely, 2^43778713 is an apocalyptic number.

It is an amenable number.

43778713 is a deficient number, since it is larger than the sum of its proper divisors (3979895).

43778713 is a wasteful number, since it uses less digits than its factorization.

43778713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979894.

The product of its digits is 98784, while the sum is 40.

The square root of 43778713 is about 6616.5484204380. The cubic root of 43778713 is about 352.4420051128.

The spelling of 43778713 in words is "forty-three million, seven hundred seventy-eight thousand, seven hundred thirteen".