78440119 has 2 divisors, whose sum is σ = 78440120. Its totient is φ = 78440118.

The previous prime is 78440101. The next prime is 78440171. The reversal of 78440119 is 91104487.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78440119 is a prime.

It is a super-2 number, since 2×78440119² = 12305704537468322, which contains 22 as substring.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39220059 + 39220060.

It is an arithmetic number, because the mean of its divisors is an integer number (39220060).

Almost surely, 2^78440119 is an apocalyptic number.

78440119 is a deficient number, since it is larger than the sum of its proper divisors (1).

78440119 is an equidigital number, since it uses as much as digits as its factorization.

78440119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 78440119 is about 8856.6426483177. The cubic root of 78440119 is about 428.0679845859.

The spelling of 78440119 in words is "seventy-eight million, four hundred forty thousand, one hundred nineteen".