78421119 has 32 divisors (see below), whose sum is σ = 129139200. Its totient is φ = 42166656.

The previous prime is 78421117. The next prime is 78421127. The reversal of 78421119 is 91112487.

It is not a de Polignac number, because 78421119 - 2¹ = 78421117 is a prime.

It is a super-2 number, since 2×78421119² = 12299743810424322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78421119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78421117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15252 + ... + 19734.

It is an arithmetic number, because the mean of its divisors is an integer number (4035600).

Almost surely, 2^78421119 is an apocalyptic number.

78421119 is a deficient number, since it is larger than the sum of its proper divisors (50718081).

78421119 is a wasteful number, since it uses less digits than its factorization.

78421119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4524 (or 4510 counting only the distinct ones).

The product of its digits is 4032, while the sum is 33.

The square root of 78421119 is about 8855.5699421325. The cubic root of 78421119 is about 428.0334191595.

The spelling of 78421119 in words is "seventy-eight million, four hundred twenty-one thousand, one hundred nineteen".