70981667 has 2 divisors, whose sum is σ = 70981668. Its totient is φ = 70981666.

The previous prime is 70981637. The next prime is 70981679. The reversal of 70981667 is 76618907.

It is a strong prime.

It is an emirp because it is prime and its reverse (76618907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70981667 - 2¹⁰ = 70980643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70981607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35490833 + 35490834.

It is an arithmetic number, because the mean of its divisors is an integer number (35490834).

Almost surely, 2^70981667 is an apocalyptic number.

70981667 is a deficient number, since it is larger than the sum of its proper divisors (1).

70981667 is an equidigital number, since it uses as much as digits as its factorization.

70981667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 70981667 is about 8425.0618395357. The cubic root of 70981667 is about 414.0461316809.

The spelling of 70981667 in words is "seventy million, nine hundred eighty-one thousand, six hundred sixty-seven".