78961241 has 2 divisors, whose sum is σ = 78961242. Its totient is φ = 78961240.

The previous prime is 78961199. The next prime is 78961249. The reversal of 78961241 is 14216987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46185616 + 32775625 = 6796^2 + 5725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78961241 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78961195 and 78961204.

It is not a weakly prime, because it can be changed into another prime (78961249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39480620 + 39480621.

It is an arithmetic number, because the mean of its divisors is an integer number (39480621).

Almost surely, 2^78961241 is an apocalyptic number.

It is an amenable number.

78961241 is a deficient number, since it is larger than the sum of its proper divisors (1).

78961241 is an equidigital number, since it uses as much as digits as its factorization.

78961241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 78961241 is about 8886.0137857197. The cubic root of 78961241 is about 429.0138587829.

The spelling of 78961241 in words is "seventy-eight million, nine hundred sixty-one thousand, two hundred forty-one".