401231197 has 2 divisors, whose sum is σ = 401231198. Its totient is φ = 401231196.

The previous prime is 401231167. The next prime is 401231203. The reversal of 401231197 is 791132104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293299876 + 107931321 = 17126^2 + 10389^2 .

It is a cyclic number.

It is not a de Polignac number, because 401231197 - 2¹⁹ = 400706909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401231167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200615598 + 200615599.

It is an arithmetic number, because the mean of its divisors is an integer number (200615599).

Almost surely, 2^401231197 is an apocalyptic number.

It is an amenable number.

401231197 is a deficient number, since it is larger than the sum of its proper divisors (1).

401231197 is an equidigital number, since it uses as much as digits as its factorization.

401231197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 401231197 is about 20030.7562762867. The cubic root of 401231197 is about 737.5614868586.

The spelling of 401231197 in words is "four hundred one million, two hundred thirty-one thousand, one hundred ninety-seven".