78119459 has 4 divisors (see below), whose sum is σ = 85221240. Its totient is φ = 71017680.

The previous prime is 78119449. The next prime is 78119513. The reversal of 78119459 is 95491187.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78119459 - 2⁴ = 78119443 is a prime.

It is a super-2 number, since 2×78119459² = 12205299748905362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78119449) 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, 3550874 + ... + 3550895.

It is an arithmetic number, because the mean of its divisors is an integer number (21305310).

Almost surely, 2^78119459 is an apocalyptic number.

78119459 is a deficient number, since it is larger than the sum of its proper divisors (7101781).

78119459 is a wasteful number, since it uses less digits than its factorization.

78119459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101780.

The product of its digits is 90720, while the sum is 44.

The square root of 78119459 is about 8838.5213129799. The cubic root of 78119459 is about 427.4838797884.

The spelling of 78119459 in words is "seventy-eight million, one hundred nineteen thousand, four hundred fifty-nine".