70823813 has 2 divisors, whose sum is σ = 70823814. Its totient is φ = 70823812.

The previous prime is 70823807. The next prime is 70823827. The reversal of 70823813 is 31832807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55323844 + 15499969 = 7438^2 + 3937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70823813 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70823813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70823833) 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, 35411906 + 35411907.

It is an arithmetic number, because the mean of its divisors is an integer number (35411907).

Almost surely, 2^70823813 is an apocalyptic number.

It is an amenable number.

70823813 is a deficient number, since it is larger than the sum of its proper divisors (1).

70823813 is an equidigital number, since it uses as much as digits as its factorization.

70823813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 70823813 is about 8415.6885042164. The cubic root of 70823813 is about 413.7389756192.

The spelling of 70823813 in words is "seventy million, eight hundred twenty-three thousand, eight hundred thirteen".