193897143312979 has 8 divisors (see below), whose sum is σ = 195687986670000. Its totient is φ = 192106517601312.

The previous prime is 193897143312937. The next prime is 193897143312991. The reversal of 193897143312979 is 979213341798391.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 193897143312979 - 2¹⁹ = 193897142788691 is a prime.

It is a super-2 number, since 2×193897143312979² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (193897143322979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52621069 + ... + 56185150.

It is an arithmetic number, because the mean of its divisors is an integer number (24460998333750).

Almost surely, 2^{193897143312979} is an apocalyptic number.

193897143312979 is a deficient number, since it is larger than the sum of its proper divisors (1790843357021).

193897143312979 is a wasteful number, since it uses less digits than its factorization.

193897143312979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108822677.

The product of its digits is 555532992, while the sum is 76.

The spelling of 193897143312979 in words is "one hundred ninety-three trillion, eight hundred ninety-seven billion, one hundred forty-three million, three hundred twelve thousand, nine hundred seventy-nine".