1957199999 has 2 divisors, whose sum is σ = 1957200000. Its totient is φ = 1957199998.

The previous prime is 1957199969. The next prime is 1957200029. The reversal of 1957199999 is 9999917591.

It is a balanced prime because it is at equal distance from previous prime (1957199969) and next prime (1957200029).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1957199999 is a prime.

1957199999 is a modest number, since divided by 99999 gives 19571 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1957199969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978599999 + 978600000.

It is an arithmetic number, because the mean of its divisors is an integer number (978600000).

Almost surely, 2^1957199999 is an apocalyptic number.

1957199999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957199999 is an equidigital number, since it uses as much as digits as its factorization.

1957199999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18600435, while the sum is 68.

The square root of 1957199999 is about 44240.2531525307. The cubic root of 1957199999 is about 1250.8687292278.

The spelling of 1957199999 in words is "one billion, nine hundred fifty-seven million, one hundred ninety-nine thousand, nine hundred ninety-nine".