1958899 has 2 divisors, whose sum is σ = 1958900. Its totient is φ = 1958898.

The previous prime is 1958897. The next prime is 1958909. The reversal of 1958899 is 9988591.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1958899 - 2¹ = 1958897 is a prime.

Together with 1958897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1958897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979449 + 979450.

It is an arithmetic number, because the mean of its divisors is an integer number (979450).

2^1958899 is an apocalyptic number.

1958899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1958899 is an equidigital number, since it uses as much as digits as its factorization.

1958899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 49.

The square root of 1958899 is about 1399.6067304782. The cubic root of 1958899 is about 125.1230574818.

The spelling of 1958899 in words is "one million, nine hundred fifty-eight thousand, eight hundred ninety-nine".