401655701 has 2 divisors, whose sum is σ = 401655702. Its totient is φ = 401655700.

The previous prime is 401655697. The next prime is 401655707. The reversal of 401655701 is 107556104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393982801 + 7672900 = 19849^2 + 2770^2 .

It is a cyclic number.

It is not a de Polignac number, because 401655701 - 2² = 401655697 is a prime.

It is a super-2 number, since 2×401655701² = 322654604291602802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401655707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200827850 + 200827851.

It is an arithmetic number, because the mean of its divisors is an integer number (200827851).

Almost surely, 2^401655701 is an apocalyptic number.

It is an amenable number.

401655701 is a deficient number, since it is larger than the sum of its proper divisors (1).

401655701 is an equidigital number, since it uses as much as digits as its factorization.

401655701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 401655701 is about 20041.3497798926. The cubic root of 401655701 is about 737.8215093835.

The spelling of 401655701 in words is "four hundred one million, six hundred fifty-five thousand, seven hundred one".