70612181 has 2 divisors, whose sum is σ = 70612182. Its totient is φ = 70612180.

The previous prime is 70612177. The next prime is 70612207. The reversal of 70612181 is 18121607.

It is an a-pointer prime, because the next prime (70612207) can be obtained adding 70612181 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58599025 + 12013156 = 7655^2 + 3466^2 .

It is a cyclic number.

It is not a de Polignac number, because 70612181 - 2² = 70612177 is a prime.

It is a super-2 number, since 2×70612181² = 9972160211153522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70612181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70612111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35306090 + 35306091.

It is an arithmetic number, because the mean of its divisors is an integer number (35306091).

Almost surely, 2^70612181 is an apocalyptic number.

It is an amenable number.

70612181 is a deficient number, since it is larger than the sum of its proper divisors (1).

70612181 is an equidigital number, since it uses as much as digits as its factorization.

70612181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 70612181 is about 8403.1054378724. The cubic root of 70612181 is about 413.3264600979.

Adding to 70612181 its reverse (18121607), we get a palindrome (88733788).

The spelling of 70612181 in words is "seventy million, six hundred twelve thousand, one hundred eighty-one".