70789217 has 2 divisors, whose sum is σ = 70789218. Its totient is φ = 70789216.

The previous prime is 70789157. The next prime is 70789237. The reversal of 70789217 is 71298707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70543201 + 246016 = 8399^2 + 496^2 .

It is a cyclic number.

It is not a de Polignac number, because 70789217 - 2⁶ = 70789153 is a prime.

It is a super-2 number, since 2×70789217² = 10022226486946178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70789237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35394608 + 35394609.

It is an arithmetic number, because the mean of its divisors is an integer number (35394609).

Almost surely, 2^70789217 is an apocalyptic number.

It is an amenable number.

70789217 is a deficient number, since it is larger than the sum of its proper divisors (1).

70789217 is an equidigital number, since it uses as much as digits as its factorization.

70789217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 70789217 is about 8413.6328063447. The cubic root of 70789217 is about 413.6715969402.

The spelling of 70789217 in words is "seventy million, seven hundred eighty-nine thousand, two hundred seventeen".