401776601 has 2 divisors, whose sum is σ = 401776602. Its totient is φ = 401776600.

The previous prime is 401776591. The next prime is 401776637. The reversal of 401776601 is 106677104.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263737600 + 138039001 = 16240^2 + 11749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401776601 is a prime.

It is a super-2 number, since 2×401776601² = 322848874222226402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (401776681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200888300 + 200888301.

It is an arithmetic number, because the mean of its divisors is an integer number (200888301).

Almost surely, 2^401776601 is an apocalyptic number.

It is an amenable number.

401776601 is a deficient number, since it is larger than the sum of its proper divisors (1).

401776601 is an equidigital number, since it uses as much as digits as its factorization.

401776601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 401776601 is about 20044.3658168574. The cubic root of 401776601 is about 737.8955310491.

The spelling of 401776601 in words is "four hundred one million, seven hundred seventy-six thousand, six hundred one".