70531873 has 2 divisors, whose sum is σ = 70531874. Its totient is φ = 70531872.

The previous prime is 70531837. The next prime is 70531883. The reversal of 70531873 is 37813507.

Together with previous prime (70531837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47568609 + 22963264 = 6897^2 + 4792^2 .

It is a cyclic number.

It is not a de Polignac number, because 70531873 - 2²⁵ = 36977441 is a prime.

It is not a weakly prime, because it can be changed into another prime (70531883) 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, 35265936 + 35265937.

It is an arithmetic number, because the mean of its divisors is an integer number (35265937).

Almost surely, 2^70531873 is an apocalyptic number.

It is an amenable number.

70531873 is a deficient number, since it is larger than the sum of its proper divisors (1).

70531873 is an equidigital number, since it uses as much as digits as its factorization.

70531873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 70531873 is about 8398.3256069290. The cubic root of 70531873 is about 413.1697071005.

The spelling of 70531873 in words is "seventy million, five hundred thirty-one thousand, eight hundred seventy-three".