19970227 has 2 divisors, whose sum is σ = 19970228. Its totient is φ = 19970226.

The previous prime is 19970219. The next prime is 19970267. The reversal of 19970227 is 72207991.

It is a weak prime.

It is an emirp because it is prime and its reverse (72207991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19970227 - 2³ = 19970219 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19970207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9985113 + 9985114.

It is an arithmetic number, because the mean of its divisors is an integer number (9985114).

Almost surely, 2^19970227 is an apocalyptic number.

19970227 is a deficient number, since it is larger than the sum of its proper divisors (1).

19970227 is an equidigital number, since it uses as much as digits as its factorization.

19970227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 19970227 is about 4468.8059926562. The cubic root of 19970227 is about 271.3070008406.

The spelling of 19970227 in words is "nineteen million, nine hundred seventy thousand, two hundred twenty-seven".