78947097407 has 2 divisors, whose sum is σ = 78947097408. Its totient is φ = 78947097406.

The previous prime is 78947097367. The next prime is 78947097421. The reversal of 78947097407 is 70479074987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78947097407 - 2¹⁶ = 78947031871 is a prime.

It is a super-2 number, since 2×78947097407² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78947097407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78947097107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39473548703 + 39473548704.

It is an arithmetic number, because the mean of its divisors is an integer number (39473548704).

Almost surely, 2^78947097407 is an apocalyptic number.

78947097407 is a deficient number, since it is larger than the sum of its proper divisors (1).

78947097407 is an equidigital number, since it uses as much as digits as its factorization.

78947097407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24893568, while the sum is 62.

The spelling of 78947097407 in words is "seventy-eight billion, nine hundred forty-seven million, ninety-seven thousand, four hundred seven".