197730031 has 2 divisors, whose sum is σ = 197730032. Its totient is φ = 197730030.

The previous prime is 197729981. The next prime is 197730037. The reversal of 197730031 is 130037791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197730031 - 2¹¹ = 197727983 is a prime.

It is a super-2 number, since 2×197730031² = 78194330318521922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 197729975 and 197730002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197730037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98865015 + 98865016.

It is an arithmetic number, because the mean of its divisors is an integer number (98865016).

Almost surely, 2^197730031 is an apocalyptic number.

197730031 is a deficient number, since it is larger than the sum of its proper divisors (1).

197730031 is an equidigital number, since it uses as much as digits as its factorization.

197730031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 197730031 is about 14061.6510765984. The cubic root of 197730031 is about 582.5826474981.

The spelling of 197730031 in words is "one hundred ninety-seven million, seven hundred thirty thousand, thirty-one".