1997464219 has 2 divisors, whose sum is σ = 1997464220. Its totient is φ = 1997464218.

The previous prime is 1997464211. The next prime is 1997464237. The reversal of 1997464219 is 9124647991.

It is a weak prime.

It is an emirp because it is prime and its reverse (9124647991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1997464219 - 2³ = 1997464211 is a prime.

It is a super-2 number, since 2×1997464219² = 7979726612370559922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1997464211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998732109 + 998732110.

It is an arithmetic number, because the mean of its divisors is an integer number (998732110).

Almost surely, 2^1997464219 is an apocalyptic number.

1997464219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997464219 is an equidigital number, since it uses as much as digits as its factorization.

1997464219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 1997464219 is about 44692.9996643770. Note that the first 3 decimals coincide. The cubic root of 1997464219 is about 1259.3883440505.

The spelling of 1997464219 in words is "one billion, nine hundred ninety-seven million, four hundred sixty-four thousand, two hundred nineteen".