70478489 has 2 divisors, whose sum is σ = 70478490. Its totient is φ = 70478488.

The previous prime is 70478423. The next prime is 70478519. The reversal of 70478489 is 98487407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60918025 + 9560464 = 7805^2 + 3092^2 .

It is an emirp because it is prime and its reverse (98487407) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70478489 - 2²⁴ = 53701273 is a prime.

It is a super-3 number, since 3×70478489³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70478189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35239244 + 35239245.

It is an arithmetic number, because the mean of its divisors is an integer number (35239245).

Almost surely, 2^70478489 is an apocalyptic number.

It is an amenable number.

70478489 is a deficient number, since it is larger than the sum of its proper divisors (1).

70478489 is an equidigital number, since it uses as much as digits as its factorization.

70478489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 70478489 is about 8395.1467527376. The cubic root of 70478489 is about 413.0654411483.

The spelling of 70478489 in words is "seventy million, four hundred seventy-eight thousand, four hundred eighty-nine".