78341109 has 16 divisors (see below), whose sum is σ = 130229760. Its totient is φ = 40696560.

The previous prime is 78341101. The next prime is 78341111. The reversal of 78341109 is 90114387.

It is not a de Polignac number, because 78341109 - 2³ = 78341101 is a prime.

It is a super-2 number, since 2×78341109² = 12274658718699762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78341109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78341101) 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, 169339 + ... + 169800.

It is an arithmetic number, because the mean of its divisors is an integer number (8139360).

Almost surely, 2^78341109 is an apocalyptic number.

It is an amenable number.

78341109 is a deficient number, since it is larger than the sum of its proper divisors (51888651).

78341109 is a wasteful number, since it uses less digits than its factorization.

78341109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339160.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 78341109 is about 8851.0512934905. The cubic root of 78341109 is about 427.8878010409.

The spelling of 78341109 in words is "seventy-eight million, three hundred forty-one thousand, one hundred nine".