1953899999 has 2 divisors, whose sum is σ = 1953900000. Its totient is φ = 1953899998.

The previous prime is 1953899993. The next prime is 1953900019. The reversal of 1953899999 is 9999983591.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1953899999 is a prime.

It is a Sophie Germain prime.

1953899999 is a modest number, since divided by 99999 gives 19538 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1953899993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976949999 + 976950000.

It is an arithmetic number, because the mean of its divisors is an integer number (976950000).

Almost surely, 2^1953899999 is an apocalyptic number.

1953899999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953899999 is an equidigital number, since it uses as much as digits as its factorization.

1953899999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63772920, while the sum is 71.

The square root of 1953899999 is about 44202.9410673091. The cubic root of 1953899999 is about 1250.1653112568.

The spelling of 1953899999 in words is "one billion, nine hundred fifty-three million, eight hundred ninety-nine thousand, nine hundred ninety-nine".