1999958593 has 2 divisors, whose sum is σ = 1999958594. Its totient is φ = 1999958592.

The previous prime is 1999958579. The next prime is 1999958599. The reversal of 1999958593 is 3958599991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1331374144 + 668584449 = 36488^2 + 25857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1999958593 - 2¹³ = 1999950401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1999958599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999979296 + 999979297.

It is an arithmetic number, because the mean of its divisors is an integer number (999979297).

Almost surely, 2^1999958593 is an apocalyptic number.

It is an amenable number.

1999958593 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999958593 is an equidigital number, since it uses as much as digits as its factorization.

1999958593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35429400, while the sum is 67.

The square root of 1999958593 is about 44720.8966032659. The cubic root of 1999958593 is about 1259.9123549097.

The spelling of 1999958593 in words is "one billion, nine hundred ninety-nine million, nine hundred fifty-eight thousand, five hundred ninety-three".