78101089 has 16 divisors (see below), whose sum is σ = 89032320. Its totient is φ = 67858560.

The previous prime is 78101083. The next prime is 78101099. The reversal of 78101089 is 98010187.

It is not a de Polignac number, because 78101089 - 2³ = 78101081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78101081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31669 + ... + 34045.

It is an arithmetic number, because the mean of its divisors is an integer number (5564520).

Almost surely, 2^78101089 is an apocalyptic number.

It is an amenable number.

78101089 is a deficient number, since it is larger than the sum of its proper divisors (10931231).

78101089 is a wasteful number, since it uses less digits than its factorization.

78101089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 78101089 is about 8837.4820509012. The cubic root of 78101089 is about 427.4503691685.

The spelling of 78101089 in words is "seventy-eight million, one hundred one thousand, eighty-nine".