70829309 has 2 divisors, whose sum is σ = 70829310. Its totient is φ = 70829308.

The previous prime is 70829287. The next prime is 70829333. The reversal of 70829309 is 90392807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39413284 + 31416025 = 6278^2 + 5605^2 .

It is a cyclic number.

It is not a de Polignac number, because 70829309 - 2¹⁶ = 70763773 is a prime.

It is a super-3 number, since 3×70829309³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70829609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35414654 + 35414655.

It is an arithmetic number, because the mean of its divisors is an integer number (35414655).

Almost surely, 2^70829309 is an apocalyptic number.

It is an amenable number.

70829309 is a deficient number, since it is larger than the sum of its proper divisors (1).

70829309 is an equidigital number, since it uses as much as digits as its factorization.

70829309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 70829309 is about 8416.0150308801. The cubic root of 70829309 is about 413.7496775310.

The spelling of 70829309 in words is "seventy million, eight hundred twenty-nine thousand, three hundred nine".