70387313 has 2 divisors, whose sum is σ = 70387314. Its totient is φ = 70387312.

The previous prime is 70387301. The next prime is 70387363. The reversal of 70387313 is 31378307.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46689889 + 23697424 = 6833^2 + 4868^2 .

It is an emirp because it is prime and its reverse (31378307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70387313 - 2¹⁰ = 70386289 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 70387313.

It is not a weakly prime, because it can be changed into another prime (70387363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35193656 + 35193657.

It is an arithmetic number, because the mean of its divisors is an integer number (35193657).

Almost surely, 2^70387313 is an apocalyptic number.

It is an amenable number.

70387313 is a deficient number, since it is larger than the sum of its proper divisors (1).

70387313 is an equidigital number, since it uses as much as digits as its factorization.

70387313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 70387313 is about 8389.7147150544. The cubic root of 70387313 is about 412.8872406435.

The spelling of 70387313 in words is "seventy million, three hundred eighty-seven thousand, three hundred thirteen".