70917409 has 2 divisors, whose sum is σ = 70917410. Its totient is φ = 70917408.

The previous prime is 70917403. The next prime is 70917433. The reversal of 70917409 is 90471907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50694400 + 20223009 = 7120^2 + 4497^2 .

It is a cyclic number.

It is not a de Polignac number, because 70917409 - 2³ = 70917401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70917401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35458704 + 35458705.

It is an arithmetic number, because the mean of its divisors is an integer number (35458705).

Almost surely, 2^70917409 is an apocalyptic number.

It is an amenable number.

70917409 is a deficient number, since it is larger than the sum of its proper divisors (1).

70917409 is an equidigital number, since it uses as much as digits as its factorization.

70917409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 70917409 is about 8421.2474729104. The cubic root of 70917409 is about 413.9211519502.

The spelling of 70917409 in words is "seventy million, nine hundred seventeen thousand, four hundred nine".