70905071 has 2 divisors, whose sum is σ = 70905072. Its totient is φ = 70905070.

The previous prime is 70905047. The next prime is 70905089. The reversal of 70905071 is 17050907.

It is a strong prime.

It is an emirp because it is prime and its reverse (17050907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70905071 - 2⁶ = 70905007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70905001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35452535 + 35452536.

It is an arithmetic number, because the mean of its divisors is an integer number (35452536).

Almost surely, 2^70905071 is an apocalyptic number.

70905071 is a deficient number, since it is larger than the sum of its proper divisors (1).

70905071 is an equidigital number, since it uses as much as digits as its factorization.

70905071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2205, while the sum is 29.

The square root of 70905071 is about 8420.5148892452. The cubic root of 70905071 is about 413.8971463008.

Adding to 70905071 its reverse (17050907), we get a palindrome (87955978).

The spelling of 70905071 in words is "seventy million, nine hundred five thousand, seventy-one".