31973728199 has 8 divisors (see below), whose sum is σ = 36725030400. Its totient is φ = 27268332696.

The previous prime is 31973728169. The next prime is 31973728201. The reversal of 31973728199 is 99182737913.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31973728199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31973728169) 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, 11475179 + ... + 11477964.

It is an arithmetic number, because the mean of its divisors is an integer number (4590628800).

Almost surely, 2^31973728199 is an apocalyptic number.

31973728199 is a deficient number, since it is larger than the sum of its proper divisors (4751302201).

31973728199 is a wasteful number, since it uses less digits than its factorization.

31973728199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22953349.

The product of its digits is 5143824, while the sum is 59.

The spelling of 31973728199 in words is "thirty-one billion, nine hundred seventy-three million, seven hundred twenty-eight thousand, one hundred ninety-nine".