78930101 has 2 divisors, whose sum is σ = 78930102. Its totient is φ = 78930100.

The previous prime is 78930053. The next prime is 78930127. The reversal of 78930101 is 10103987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75864100 + 3066001 = 8710^2 + 1751^2 .

It is an emirp because it is prime and its reverse (10103987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78930101 - 2⁶ = 78930037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78930191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39465050 + 39465051.

It is an arithmetic number, because the mean of its divisors is an integer number (39465051).

Almost surely, 2^78930101 is an apocalyptic number.

It is an amenable number.

78930101 is a deficient number, since it is larger than the sum of its proper divisors (1).

78930101 is an equidigital number, since it uses as much as digits as its factorization.

78930101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 78930101 is about 8884.2614211875. The cubic root of 78930101 is about 428.9574545354.

The spelling of 78930101 in words is "seventy-eight million, nine hundred thirty thousand, one hundred one".