78030061 has 2 divisors, whose sum is σ = 78030062. Its totient is φ = 78030060.

The previous prime is 78030023. The next prime is 78030067. The reversal of 78030061 is 16003087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58049161 + 19980900 = 7619^2 + 4470^2 .

It is an emirp because it is prime and its reverse (16003087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78030061 - 2¹³ = 78021869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78030067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39015030 + 39015031.

It is an arithmetic number, because the mean of its divisors is an integer number (39015031).

Almost surely, 2^78030061 is an apocalyptic number.

It is an amenable number.

78030061 is a deficient number, since it is larger than the sum of its proper divisors (1).

78030061 is an equidigital number, since it uses as much as digits as its factorization.

78030061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 78030061 is about 8833.4625713816. The cubic root of 78030061 is about 427.3207501766.

The spelling of 78030061 in words is "seventy-eight million, thirty thousand, sixty-one".