70890943 has 2 divisors, whose sum is σ = 70890944. Its totient is φ = 70890942.

The previous prime is 70890929. The next prime is 70890959. The reversal of 70890943 is 34909807.

It is a weak prime.

It is an emirp because it is prime and its reverse (34909807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70890943 - 2¹³ = 70882751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70890896 and 70890905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70890343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35445471 + 35445472.

It is an arithmetic number, because the mean of its divisors is an integer number (35445472).

Almost surely, 2^70890943 is an apocalyptic number.

70890943 is a deficient number, since it is larger than the sum of its proper divisors (1).

70890943 is an equidigital number, since it uses as much as digits as its factorization.

70890943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 70890943 is about 8419.6759438829. The cubic root of 70890943 is about 413.8696544857.

The spelling of 70890943 in words is "seventy million, eight hundred ninety thousand, nine hundred forty-three".