70850513 has 2 divisors, whose sum is σ = 70850514. Its totient is φ = 70850512.

The previous prime is 70850477. The next prime is 70850519. The reversal of 70850513 is 31505807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70845889 + 4624 = 8417^2 + 68^2 .

It is an emirp because it is prime and its reverse (31505807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70850513 - 2¹⁶ = 70784977 is a prime.

It is not a weakly prime, because it can be changed into another prime (70850519) 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, 35425256 + 35425257.

It is an arithmetic number, because the mean of its divisors is an integer number (35425257).

Almost surely, 2^70850513 is an apocalyptic number.

It is an amenable number.

70850513 is a deficient number, since it is larger than the sum of its proper divisors (1).

70850513 is an equidigital number, since it uses as much as digits as its factorization.

70850513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 70850513 is about 8417.2746777089. The cubic root of 70850513 is about 413.7909611604.

The spelling of 70850513 in words is "seventy million, eight hundred fifty thousand, five hundred thirteen".