70691161 has 2 divisors, whose sum is σ = 70691162. Its totient is φ = 70691160.

The previous prime is 70691143. The next prime is 70691171. The reversal of 70691161 is 16119607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 4756761 = 8120^2 + 2181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70691161 is a prime.

It is not a weakly prime, because it can be changed into another prime (70691111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35345580 + 35345581.

It is an arithmetic number, because the mean of its divisors is an integer number (35345581).

Almost surely, 2^70691161 is an apocalyptic number.

It is an amenable number.

70691161 is a deficient number, since it is larger than the sum of its proper divisors (1).

70691161 is an equidigital number, since it uses as much as digits as its factorization.

70691161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 70691161 is about 8407.8035776295. The cubic root of 70691161 is about 413.4805050983.

The spelling of 70691161 in words is "seventy million, six hundred ninety-one thousand, one hundred sixty-one".