401905213189 has 2 divisors, whose sum is σ = 401905213190. Its totient is φ = 401905213188.

The previous prime is 401905213121. The next prime is 401905213201. The reversal of 401905213189 is 981312509104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254167222500 + 147737990689 = 504150^2 + 384367^2 .

It is a cyclic number.

It is not a de Polignac number, because 401905213189 - 2³¹ = 399757729541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401905213289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200952606594 + 200952606595.

It is an arithmetic number, because the mean of its divisors is an integer number (200952606595).

Almost surely, 2^401905213189 is an apocalyptic number.

It is an amenable number.

401905213189 is a deficient number, since it is larger than the sum of its proper divisors (1).

401905213189 is an equidigital number, since it uses as much as digits as its factorization.

401905213189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 401905213189 in words is "four hundred one billion, nine hundred five million, two hundred thirteen thousand, one hundred eighty-nine".