78763783 has 4 divisors (see below), whose sum is σ = 90015760. Its totient is φ = 67511808.

The previous prime is 78763781. The next prime is 78763801. The reversal of 78763783 is 38736787.

It is a happy number.

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

It is not a de Polignac number, because 78763783 - 2¹ = 78763781 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 (78763781) 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, 5625978 + ... + 5625991.

It is an arithmetic number, because the mean of its divisors is an integer number (22503940).

Almost surely, 2^78763783 is an apocalyptic number.

78763783 is a deficient number, since it is larger than the sum of its proper divisors (11251977).

78763783 is a wasteful number, since it uses less digits than its factorization.

78763783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11251976.

The product of its digits is 1185408, while the sum is 49.

The square root of 78763783 is about 8874.8962247454. The cubic root of 78763783 is about 428.6559493037.

The spelling of 78763783 in words is "seventy-eight million, seven hundred sixty-three thousand, seven hundred eighty-three".