78690119 has 2 divisors, whose sum is σ = 78690120. Its totient is φ = 78690118.

The previous prime is 78690113. The next prime is 78690169. The reversal of 78690119 is 91109687.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (91109687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78690119 - 2¹⁶ = 78624583 is a prime.

It is a super-2 number, since 2×78690119² = 12384269656468322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78690113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39345059 + 39345060.

It is an arithmetic number, because the mean of its divisors is an integer number (39345060).

Almost surely, 2^78690119 is an apocalyptic number.

78690119 is a deficient number, since it is larger than the sum of its proper divisors (1).

78690119 is an equidigital number, since it uses as much as digits as its factorization.

78690119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 78690119 is about 8870.7451209016. The cubic root of 78690119 is about 428.5222738175.

The spelling of 78690119 in words is "seventy-eight million, six hundred ninety thousand, one hundred nineteen".