198679232731 has 6 divisors (see below), whose sum is σ = 231116658540. Its totient is φ = 170296485156.

The previous prime is 198679232711. The next prime is 198679232803. The reversal of 198679232731 is 137232976891.

It is not a de Polignac number, because 198679232731 - 2¹⁵ = 198679199963 is a prime.

It is a super-2 number, since 2×198679232731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198679232701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2027339061 + ... + 2027339158.

It is an arithmetic number, because the mean of its divisors is an integer number (38519443090).

Almost surely, 2^198679232731 is an apocalyptic number.

198679232731 is a deficient number, since it is larger than the sum of its proper divisors (32437425809).

198679232731 is an equidigital number, since it uses as much as digits as its factorization.

198679232731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054678233 (or 4054678226 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 58.

The spelling of 198679232731 in words is "one hundred ninety-eight billion, six hundred seventy-nine million, two hundred thirty-two thousand, seven hundred thirty-one".