401187569 has 2 divisors, whose sum is σ = 401187570. Its totient is φ = 401187568.

The previous prime is 401187533. The next prime is 401187599. The reversal of 401187569 is 965781104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380757169 + 20430400 = 19513^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 401187569 - 2¹² = 401183473 is a prime.

It is a super-2 number, since 2×401187569² = 321902931040259522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401187529) 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, 200593784 + 200593785.

It is an arithmetic number, because the mean of its divisors is an integer number (200593785).

Almost surely, 2^401187569 is an apocalyptic number.

It is an amenable number.

401187569 is a deficient number, since it is larger than the sum of its proper divisors (1).

401187569 is an equidigital number, since it uses as much as digits as its factorization.

401187569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 401187569 is about 20029.6672213994. The cubic root of 401187569 is about 737.5347528965.

The spelling of 401187569 in words is "four hundred one million, one hundred eighty-seven thousand, five hundred sixty-nine".