78944951 has 2 divisors, whose sum is σ = 78944952. Its totient is φ = 78944950.

The previous prime is 78944927. The next prime is 78944969. The reversal of 78944951 is 15944987.

It is a strong prime.

It is an emirp because it is prime and its reverse (15944987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78944951 - 2¹⁰ = 78943927 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78944896 and 78944905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78944251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39472475 + 39472476.

It is an arithmetic number, because the mean of its divisors is an integer number (39472476).

Almost surely, 2^78944951 is an apocalyptic number.

78944951 is a deficient number, since it is larger than the sum of its proper divisors (1).

78944951 is an equidigital number, since it uses as much as digits as its factorization.

78944951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 78944951 is about 8885.0971294635. The cubic root of 78944951 is about 428.9843543648.

The spelling of 78944951 in words is "seventy-eight million, nine hundred forty-four thousand, nine hundred fifty-one".