197498831 has 2 divisors, whose sum is σ = 197498832. Its totient is φ = 197498830.

The previous prime is 197498813. The next prime is 197498837. The reversal of 197498831 is 138894791.

Together with previous prime (197498813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197498831 is a prime.

It is a super-2 number, since 2×197498831² = 78011576492733122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197498831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197498837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98749415 + 98749416.

It is an arithmetic number, because the mean of its divisors is an integer number (98749416).

Almost surely, 2^197498831 is an apocalyptic number.

197498831 is a deficient number, since it is larger than the sum of its proper divisors (1).

197498831 is an equidigital number, since it uses as much as digits as its factorization.

197498831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 197498831 is about 14053.4277313401. The cubic root of 197498831 is about 582.3554932664.

The spelling of 197498831 in words is "one hundred ninety-seven million, four hundred ninety-eight thousand, eight hundred thirty-one".