1964399 has 2 divisors, whose sum is σ = 1964400. Its totient is φ = 1964398.

The previous prime is 1964387. The next prime is 1964411. The reversal of 1964399 is 9934691.

It is a balanced prime because it is at equal distance from previous prime (1964387) and next prime (1964411).

It is a cyclic number.

It is not a de Polignac number, because 1964399 - 2⁸ = 1964143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982199 + 982200.

It is an arithmetic number, because the mean of its divisors is an integer number (982200).

2^1964399 is an apocalyptic number.

1964399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964399 is an equidigital number, since it uses as much as digits as its factorization.

1964399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 1964399 is about 1401.5701908931. The cubic root of 1964399 is about 125.2400507102.

The spelling of 1964399 in words is "one million, nine hundred sixty-four thousand, three hundred ninety-nine".