1970218399 has 2 divisors, whose sum is σ = 1970218400. Its totient is φ = 1970218398.

The previous prime is 1970218379. The next prime is 1970218403. The reversal of 1970218399 is 9938120791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1970218399 - 2¹¹ = 1970216351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1970218309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985109199 + 985109200.

It is an arithmetic number, because the mean of its divisors is an integer number (985109200).

Almost surely, 2^1970218399 is an apocalyptic number.

1970218399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970218399 is an equidigital number, since it uses as much as digits as its factorization.

1970218399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 1970218399 is about 44387.1422711578. The cubic root of 1970218399 is about 1253.6360051052.

The spelling of 1970218399 in words is "one billion, nine hundred seventy million, two hundred eighteen thousand, three hundred ninety-nine".