198792031381 has 2 divisors, whose sum is σ = 198792031382. Its totient is φ = 198792031380.

The previous prime is 198792031337. The next prime is 198792031387. The reversal of 198792031381 is 183130297891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168790327281 + 30001704100 = 410841^2 + 173210^2 .

It is a cyclic number.

It is not a de Polignac number, because 198792031381 - 2⁹ = 198792030869 is a prime.

It is a super-2 number, since 2×198792031381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198792031387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99396015690 + 99396015691.

It is an arithmetic number, because the mean of its divisors is an integer number (99396015691).

Almost surely, 2^198792031381 is an apocalyptic number.

It is an amenable number.

198792031381 is a deficient number, since it is larger than the sum of its proper divisors (1).

198792031381 is an equidigital number, since it uses as much as digits as its factorization.

198792031381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 198792031381 in words is "one hundred ninety-eight billion, seven hundred ninety-two million, thirty-one thousand, three hundred eighty-one".