78884081 has 4 divisors (see below), whose sum is σ = 79099392. Its totient is φ = 78668772.

The previous prime is 78884051. The next prime is 78884083. The reversal of 78884081 is 18048887.

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: 18048887 = 97 ⋅186071.

It is a cyclic number.

It is not a de Polignac number, because 78884081 - 2⁶ = 78884017 is a prime.

It is a super-2 number, since 2×78884081² = 12445396470429122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78884083) 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, 107105 + ... + 107838.

It is an arithmetic number, because the mean of its divisors is an integer number (19774848).

Almost surely, 2^78884081 is an apocalyptic number.

It is an amenable number.

78884081 is a deficient number, since it is larger than the sum of its proper divisors (215311).

78884081 is a wasteful number, since it uses less digits than its factorization.

78884081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215310.

The product of its (nonzero) digits is 114688, while the sum is 44.

The square root of 78884081 is about 8881.6710702435. The cubic root of 78884081 is about 428.8740708004.

The spelling of 78884081 in words is "seventy-eight million, eight hundred eighty-four thousand, eighty-one".