78948101 has 2 divisors, whose sum is σ = 78948102. Its totient is φ = 78948100.

The previous prime is 78948071. The next prime is 78948137. The reversal of 78948101 is 10184987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71385601 + 7562500 = 8449^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 78948101 - 2²⁶ = 11839237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78948151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39474050 + 39474051.

It is an arithmetic number, because the mean of its divisors is an integer number (39474051).

Almost surely, 2^78948101 is an apocalyptic number.

It is an amenable number.

78948101 is a deficient number, since it is larger than the sum of its proper divisors (1).

78948101 is an equidigital number, since it uses as much as digits as its factorization.

78948101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 78948101 is about 8885.2743908109. The cubic root of 78948101 is about 428.9900599556.

The spelling of 78948101 in words is "seventy-eight million, nine hundred forty-eight thousand, one hundred one".