1173993021599 has 4 divisors (see below), whose sum is σ = 1201295184936. Its totient is φ = 1146690858264.

The previous prime is 1173993021571. The next prime is 1173993021647. The reversal of 1173993021599 is 9951203993711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1173993021599 - 2²⁸ = 1173724586143 is a prime.

It is a super-2 number, since 2×1173993021599² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173993021899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13651081604 + ... + 13651081689.

It is an arithmetic number, because the mean of its divisors is an integer number (300323796234).

Almost surely, 2^{1173993021599} is an apocalyptic number.

1173993021599 is a deficient number, since it is larger than the sum of its proper divisors (27302163337).

1173993021599 is an equidigital number, since it uses as much as digits as its factorization.

1173993021599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27302163336.

The product of its (nonzero) digits is 4133430, while the sum is 59.

The spelling of 1173993021599 in words is "one trillion, one hundred seventy-three billion, nine hundred ninety-three million, twenty-one thousand, five hundred ninety-nine".