70878361 has 2 divisors, whose sum is σ = 70878362. Its totient is φ = 70878360.

The previous prime is 70878359. The next prime is 70878373. The reversal of 70878361 is 16387807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60918025 + 9960336 = 7805^2 + 3156^2 .

It is an emirp because it is prime and its reverse (16387807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70878361 - 2¹ = 70878359 is a prime.

Together with 70878359, it forms a pair of twin primes.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (70878461) 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, 35439180 + 35439181.

It is an arithmetic number, because the mean of its divisors is an integer number (35439181).

Almost surely, 2^70878361 is an apocalyptic number.

It is an amenable number.

70878361 is a deficient number, since it is larger than the sum of its proper divisors (1).

70878361 is an equidigital number, since it uses as much as digits as its factorization.

70878361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 70878361 is about 8418.9287323269. The cubic root of 70878361 is about 413.8451679722.

The spelling of 70878361 in words is "seventy million, eight hundred seventy-eight thousand, three hundred sixty-one".