197931401 has 2 divisors, whose sum is σ = 197931402. Its totient is φ = 197931400.

The previous prime is 197931367. The next prime is 197931421. The reversal of 197931401 is 104139791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150307600 + 47623801 = 12260^2 + 6901^2 .

It is a cyclic number.

It is not a de Polignac number, because 197931401 - 2⁶ = 197931337 is a prime.

It is not a weakly prime, because it can be changed into another prime (197931421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98965700 + 98965701.

It is an arithmetic number, because the mean of its divisors is an integer number (98965701).

Almost surely, 2^197931401 is an apocalyptic number.

It is an amenable number.

197931401 is a deficient number, since it is larger than the sum of its proper divisors (1).

197931401 is an equidigital number, since it uses as much as digits as its factorization.

197931401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 197931401 is about 14068.8095089812. The cubic root of 197931401 is about 582.7803494942.

The spelling of 197931401 in words is "one hundred ninety-seven million, nine hundred thirty-one thousand, four hundred one".