70781299987 has 2 divisors, whose sum is σ = 70781299988. Its totient is φ = 70781299986.

The previous prime is 70781299933. The next prime is 70781299999. The reversal of 70781299987 is 78999218707.

It is a strong prime.

It is an emirp because it is prime and its reverse (78999218707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70781299987 - 2²³ = 70772911379 is a prime.

It is not a weakly prime, because it can be changed into another prime (70781299387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35390649993 + 35390649994.

It is an arithmetic number, because the mean of its divisors is an integer number (35390649994).

Almost surely, 2^70781299987 is an apocalyptic number.

70781299987 is a deficient number, since it is larger than the sum of its proper divisors (1).

70781299987 is an equidigital number, since it uses as much as digits as its factorization.

70781299987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32006016, while the sum is 67.

The spelling of 70781299987 in words is "seventy billion, seven hundred eighty-one million, two hundred ninety-nine thousand, nine hundred eighty-seven".