1964396999 has 2 divisors, whose sum is σ = 1964397000. Its totient is φ = 1964396998.

The previous prime is 1964396989. The next prime is 1964397047. The reversal of 1964396999 is 9996934691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1964396999 - 2⁸ = 1964396743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964396989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982198499 + 982198500.

It is an arithmetic number, because the mean of its divisors is an integer number (982198500).

Almost surely, 2^1964396999 is an apocalyptic number.

1964396999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964396999 is an equidigital number, since it uses as much as digits as its factorization.

1964396999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25509168, while the sum is 65.

The square root of 1964396999 is about 44321.5184645111. The cubic root of 1964396999 is about 1252.4000818562.

The spelling of 1964396999 in words is "one billion, nine hundred sixty-four million, three hundred ninety-six thousand, nine hundred ninety-nine".