20070397 has 2 divisors, whose sum is σ = 20070398. Its totient is φ = 20070396.

The previous prime is 20070389. The next prime is 20070433. The reversal of 20070397 is 79307002.

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., 18071001 + 1999396 = 4251^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 20070397 - 2³ = 20070389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20070307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10035198 + 10035199.

It is an arithmetic number, because the mean of its divisors is an integer number (10035199).

Almost surely, 2^20070397 is an apocalyptic number.

It is an amenable number.

20070397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20070397 is an equidigital number, since it uses as much as digits as its factorization.

20070397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 20070397 is about 4479.9996651786. Note that the first 3 decimals coincide. The cubic root of 20070397 is about 271.7598668184.

Adding to 20070397 its reverse (79307002), we get a palindrome (99377399).

The spelling of 20070397 in words is "twenty million, seventy thousand, three hundred ninety-seven".