78325619 has 4 divisors (see below), whose sum is σ = 82448040. Its totient is φ = 74203200.

The previous prime is 78325609. The next prime is 78325631. The reversal of 78325619 is 91652387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91652387 = 103 ⋅889829.

It is a cyclic number.

It is not a de Polignac number, because 78325619 - 2⁸ = 78325363 is a prime.

It is a super-2 number, since 2×78325619² = 12269805183466322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78325609) 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, 2061182 + ... + 2061219.

It is an arithmetic number, because the mean of its divisors is an integer number (20612010).

Almost surely, 2^78325619 is an apocalyptic number.

78325619 is a deficient number, since it is larger than the sum of its proper divisors (4122421).

78325619 is a wasteful number, since it uses less digits than its factorization.

78325619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122420.

The product of its digits is 90720, while the sum is 41.

The square root of 78325619 is about 8850.1762129350. The cubic root of 78325619 is about 427.8595978025.

The spelling of 78325619 in words is "seventy-eight million, three hundred twenty-five thousand, six hundred nineteen".