70730831 has 2 divisors, whose sum is σ = 70730832. Its totient is φ = 70730830.

The previous prime is 70730813. The next prime is 70730837. The reversal of 70730831 is 13803707.

Together with previous prime (70730813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (13803707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70730831 - 2⁶ = 70730767 is a prime.

It is a super-2 number, since 2×70730831² = 10005700907901122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70730794 and 70730803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70730837) 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, 35365415 + 35365416.

It is an arithmetic number, because the mean of its divisors is an integer number (35365416).

Almost surely, 2^70730831 is an apocalyptic number.

70730831 is a deficient number, since it is larger than the sum of its proper divisors (1).

70730831 is an equidigital number, since it uses as much as digits as its factorization.

70730831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 70730831 is about 8410.1623646634. The cubic root of 70730831 is about 413.5578353902.

The spelling of 70730831 in words is "seventy million, seven hundred thirty thousand, eight hundred thirty-one".