70839169 has 2 divisors, whose sum is σ = 70839170. Its totient is φ = 70839168.

The previous prime is 70839157. The next prime is 70839173. The reversal of 70839169 is 96193807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50481025 + 20358144 = 7105^2 + 4512^2 .

It is an emirp because it is prime and its reverse (96193807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70839169 - 2⁵ = 70839137 is a prime.

It is a super-2 number, since 2×70839169² = 10036375729221122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70839869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35419584 + 35419585.

It is an arithmetic number, because the mean of its divisors is an integer number (35419585).

Almost surely, 2^70839169 is an apocalyptic number.

It is an amenable number.

70839169 is a deficient number, since it is larger than the sum of its proper divisors (1).

70839169 is an equidigital number, since it uses as much as digits as its factorization.

70839169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 70839169 is about 8416.6007984221. The cubic root of 70839169 is about 413.7688757160.

The spelling of 70839169 in words is "seventy million, eight hundred thirty-nine thousand, one hundred sixty-nine".