78011147 has 16 divisors (see below), whose sum is σ = 86925312. Its totient is φ = 69632640.

The previous prime is 78011137. The next prime is 78011149. The reversal of 78011147 is 74111087.

It is a cyclic number.

It is not a de Polignac number, because 78011147 - 2⁶ = 78011083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78011149) 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 15 ways as a sum of consecutive naturals, for example, 48872 + ... + 50442.

It is an arithmetic number, because the mean of its divisors is an integer number (5432832).

Almost surely, 2^78011147 is an apocalyptic number.

78011147 is a deficient number, since it is larger than the sum of its proper divisors (8914165).

78011147 is a wasteful number, since it uses less digits than its factorization.

78011147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 78011147 is about 8832.3919183877. The cubic root of 78011147 is about 427.2862207585.

The spelling of 78011147 in words is "seventy-eight million, eleven thousand, one hundred forty-seven".