78063281 has 4 divisors (see below), whose sum is σ = 78097392. Its totient is φ = 78029172.

The previous prime is 78063263. The next prime is 78063319. The reversal of 78063281 is 18236087.

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: 18236087 = 17 ⋅1072711.

It is a cyclic number.

It is not a de Polignac number, because 78063281 - 2¹⁴ = 78046897 is a prime.

It is a super-2 number, since 2×78063281² = 12187751680969922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78063481) 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, 13355 + ... + 18288.

It is an arithmetic number, because the mean of its divisors is an integer number (19524348).

Almost surely, 2^78063281 is an apocalyptic number.

It is an amenable number.

78063281 is a deficient number, since it is larger than the sum of its proper divisors (34111).

78063281 is a wasteful number, since it uses less digits than its factorization.

78063281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34110.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 78063281 is about 8835.3427211399. The cubic root of 78063281 is about 427.3813831391.

The spelling of 78063281 in words is "seventy-eight million, sixty-three thousand, two hundred eighty-one".