70820263 has 2 divisors, whose sum is σ = 70820264. Its totient is φ = 70820262.

The previous prime is 70820231. The next prime is 70820287. The reversal of 70820263 is 36202807.

It is a strong prime.

It is an emirp because it is prime and its reverse (36202807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70820263 - 2⁵ = 70820231 is a prime.

It is equal to p_4163428 and since 70820263 and 4163428 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70820363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35410131 + 35410132.

It is an arithmetic number, because the mean of its divisors is an integer number (35410132).

Almost surely, 2^70820263 is an apocalyptic number.

70820263 is a deficient number, since it is larger than the sum of its proper divisors (1).

70820263 is an equidigital number, since it uses as much as digits as its factorization.

70820263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 70820263 is about 8415.4775859722. The cubic root of 70820263 is about 413.7320627000.

The spelling of 70820263 in words is "seventy million, eight hundred twenty thousand, two hundred sixty-three".