401544197 has 2 divisors, whose sum is σ = 401544198. Its totient is φ = 401544196.

The previous prime is 401544193. The next prime is 401544287. The reversal of 401544197 is 791445104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393070276 + 8473921 = 19826^2 + 2911^2 .

It is a cyclic number.

It is not a de Polignac number, because 401544197 - 2² = 401544193 is a prime.

It is a super-2 number, since 2×401544197² = 322475484288749618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401544193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200772098 + 200772099.

It is an arithmetic number, because the mean of its divisors is an integer number (200772099).

Almost surely, 2^401544197 is an apocalyptic number.

It is an amenable number.

401544197 is a deficient number, since it is larger than the sum of its proper divisors (1).

401544197 is an equidigital number, since it uses as much as digits as its factorization.

401544197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 401544197 is about 20038.5677382392. The cubic root of 401544197 is about 737.7532273005.

The spelling of 401544197 in words is "four hundred one million, five hundred forty-four thousand, one hundred ninety-seven".