70728269 has 2 divisors, whose sum is σ = 70728270. Its totient is φ = 70728268.

The previous prime is 70728263. The next prime is 70728271. The reversal of 70728269 is 96282707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70728100 + 169 = 8410^2 + 13^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70728269 is a prime.

It is a super-2 number, since 2×70728269² = 10004976071472722, which contains 22 as substring.

Together with 70728271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70728263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35364134 + 35364135.

It is an arithmetic number, because the mean of its divisors is an integer number (35364135).

Almost surely, 2^70728269 is an apocalyptic number.

It is an amenable number.

70728269 is a deficient number, since it is larger than the sum of its proper divisors (1).

70728269 is an equidigital number, since it uses as much as digits as its factorization.

70728269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 70728269 is about 8410.0100475564. The cubic root of 70728269 is about 413.5528420563.

The spelling of 70728269 in words is "seventy million, seven hundred twenty-eight thousand, two hundred sixty-nine".