70213397 has 2 divisors, whose sum is σ = 70213398. Its totient is φ = 70213396.

The previous prime is 70213343. The next prime is 70213433. The reversal of 70213397 is 79331207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59197636 + 11015761 = 7694^2 + 3319^2 .

It is an emirp because it is prime and its reverse (79331207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70213397 - 2⁸ = 70213141 is a prime.

It is a super-2 number, since 2×70213397² = 9859842236559218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70213327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35106698 + 35106699.

It is an arithmetic number, because the mean of its divisors is an integer number (35106699).

Almost surely, 2^70213397 is an apocalyptic number.

It is an amenable number.

70213397 is a deficient number, since it is larger than the sum of its proper divisors (1).

70213397 is an equidigital number, since it uses as much as digits as its factorization.

70213397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 70213397 is about 8379.3434707022. The cubic root of 70213397 is about 412.5469003300.

The spelling of 70213397 in words is "seventy million, two hundred thirteen thousand, three hundred ninety-seven".