1999499 has 2 divisors, whose sum is σ = 1999500. Its totient is φ = 1999498.

The previous prime is 1999471. The next prime is 1999511. The reversal of 1999499 is 9949991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1999499 - 2⁸ = 1999243 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1999099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999749 + 999750.

It is an arithmetic number, because the mean of its divisors is an integer number (999750).

2^1999499 is an apocalyptic number.

1999499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999499 is an equidigital number, since it uses as much as digits as its factorization.

1999499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 236196, while the sum is 50.

The square root of 1999499 is about 1414.0364210302. The cubic root of 1999499 is about 125.9815837701.

The spelling of 1999499 in words is "one million, nine hundred ninety-nine thousand, four hundred ninety-nine".