1970966399 has 2 divisors, whose sum is σ = 1970966400. Its totient is φ = 1970966398.

The previous prime is 1970966359. The next prime is 1970966401. The reversal of 1970966399 is 9936690791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1970966399 - 2²⁴ = 1954189183 is a prime.

Together with 1970966401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1970966359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985483199 + 985483200.

It is an arithmetic number, because the mean of its divisors is an integer number (985483200).

Almost surely, 2^1970966399 is an apocalyptic number.

1970966399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970966399 is an equidigital number, since it uses as much as digits as its factorization.

1970966399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4960116, while the sum is 59.

The square root of 1970966399 is about 44395.5673350392. The cubic root of 1970966399 is about 1253.7946340653.

The spelling of 1970966399 in words is "one billion, nine hundred seventy million, nine hundred sixty-six thousand, three hundred ninety-nine".