401945197 has 2 divisors, whose sum is σ = 401945198. Its totient is φ = 401945196.

The previous prime is 401945189. The next prime is 401945237. The reversal of 401945197 is 791549104.

It is an a-pointer prime, because the next prime (401945237) can be obtained adding 401945197 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361228036 + 40717161 = 19006^2 + 6381^2 .

It is a cyclic number.

It is not a de Polignac number, because 401945197 - 2³ = 401945189 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 (401945497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200972598 + 200972599.

It is an arithmetic number, because the mean of its divisors is an integer number (200972599).

Almost surely, 2^401945197 is an apocalyptic number.

It is an amenable number.

401945197 is a deficient number, since it is larger than the sum of its proper divisors (1).

401945197 is an equidigital number, since it uses as much as digits as its factorization.

401945197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 401945197 is about 20048.5709465787. The cubic root of 401945197 is about 737.9987300551.

The spelling of 401945197 in words is "four hundred one million, nine hundred forty-five thousand, one hundred ninety-seven".