78283663 has 4 divisors (see below), whose sum is σ = 78681240. Its totient is φ = 77886088.

The previous prime is 78283633. The next prime is 78283739. The reversal of 78283663 is 36638287.

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 78283663 - 2⁵ = 78283631 is a prime.

It is a super-2 number, since 2×78283663² = 12256663785395138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78283603) 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, 198493 + ... + 198886.

It is an arithmetic number, because the mean of its divisors is an integer number (19670310).

Almost surely, 2^78283663 is an apocalyptic number.

78283663 is a deficient number, since it is larger than the sum of its proper divisors (397577).

78283663 is a wasteful number, since it uses less digits than its factorization.

78283663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397576.

The product of its digits is 290304, while the sum is 43.

The square root of 78283663 is about 8847.8055471399. The cubic root of 78283663 is about 427.7831882201.

The spelling of 78283663 in words is "seventy-eight million, two hundred eighty-three thousand, six hundred sixty-three".