19970323 has 2 divisors, whose sum is σ = 19970324. Its totient is φ = 19970322.

The previous prime is 19970303. The next prime is 19970329. The reversal of 19970323 is 32307991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19970323 is a prime.

It is equal to p_1268836 and since 19970323 and 1268836 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (19970329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9985161 + 9985162.

It is an arithmetic number, because the mean of its divisors is an integer number (9985162).

Almost surely, 2^19970323 is an apocalyptic number.

19970323 is a deficient number, since it is larger than the sum of its proper divisors (1).

19970323 is an equidigital number, since it uses as much as digits as its factorization.

19970323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 19970323 is about 4468.8167337675. The cubic root of 19970323 is about 271.3074355783.

The spelling of 19970323 in words is "nineteen million, nine hundred seventy thousand, three hundred twenty-three".