78949288427 has 2 divisors, whose sum is σ = 78949288428. Its totient is φ = 78949288426.

The previous prime is 78949288403. The next prime is 78949288477. The reversal of 78949288427 is 72488294987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78949288427 - 2¹⁸ = 78949026283 is a prime.

It is a super-2 number, since 2×78949288427² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78949288477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39474644213 + 39474644214.

It is an arithmetic number, because the mean of its divisors is an integer number (39474644214).

Almost surely, 2^78949288427 is an apocalyptic number.

78949288427 is a deficient number, since it is larger than the sum of its proper divisors (1).

78949288427 is an equidigital number, since it uses as much as digits as its factorization.

78949288427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 130056192, while the sum is 68.

The spelling of 78949288427 in words is "seventy-eight billion, nine hundred forty-nine million, two hundred eighty-eight thousand, four hundred twenty-seven".