78199027 has 2 divisors, whose sum is σ = 78199028. Its totient is φ = 78199026.

The previous prime is 78199001. The next prime is 78199067. The reversal of 78199027 is 72099187.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (72099187) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78199027 is a prime.

It is a super-2 number, since 2×78199027² = 12230175647493458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78199067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39099513 + 39099514.

It is an arithmetic number, because the mean of its divisors is an integer number (39099514).

Almost surely, 2^78199027 is an apocalyptic number.

78199027 is a deficient number, since it is larger than the sum of its proper divisors (1).

78199027 is an equidigital number, since it uses as much as digits as its factorization.

78199027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 78199027 is about 8843.0213728114. The cubic root of 78199027 is about 427.6289673934.

The spelling of 78199027 in words is "seventy-eight million, one hundred ninety-nine thousand, twenty-seven".