401673634213 has 2 divisors, whose sum is σ = 401673634214. Its totient is φ = 401673634212.

The previous prime is 401673634211. The next prime is 401673634231. The reversal of 401673634213 is 312436376104.

Together with next prime (401673634231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388505383204 + 13168251009 = 623302^2 + 114753^2 .

It is a cyclic number.

It is not a de Polignac number, because 401673634213 - 2¹ = 401673634211 is a prime.

It is a super-2 number, since 2×401673634213² (a number of 24 digits) contains 22 as substring.

Together with 401673634211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401673634211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200836817106 + 200836817107.

It is an arithmetic number, because the mean of its divisors is an integer number (200836817107).

Almost surely, 2^401673634213 is an apocalyptic number.

It is an amenable number.

401673634213 is a deficient number, since it is larger than the sum of its proper divisors (1).

401673634213 is an equidigital number, since it uses as much as digits as its factorization.

401673634213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 40.

The spelling of 401673634213 in words is "four hundred one billion, six hundred seventy-three million, six hundred thirty-four thousand, two hundred thirteen".