70070321 has 2 divisors, whose sum is σ = 70070322. Its totient is φ = 70070320.

The previous prime is 70070269. The next prime is 70070359. The reversal of 70070321 is 12307007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60528400 + 9541921 = 7780^2 + 3089^2 .

It is an emirp because it is prime and its reverse (12307007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70070321 - 2⁶ = 70070257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70070293 and 70070302.

It is not a weakly prime, because it can be changed into another prime (70070381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35035160 + 35035161.

It is an arithmetic number, because the mean of its divisors is an integer number (35035161).

Almost surely, 2^70070321 is an apocalyptic number.

It is an amenable number.

70070321 is a deficient number, since it is larger than the sum of its proper divisors (1).

70070321 is an equidigital number, since it uses as much as digits as its factorization.

70070321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 70070321 is about 8370.8016939837. The cubic root of 70070321 is about 412.2664899382.

Adding to 70070321 its reverse (12307007), we get a palindrome (82377328).

The spelling of 70070321 in words is "seventy million, seventy thousand, three hundred twenty-one".