401537669 has 4 divisors (see below), whose sum is σ = 432425196. Its totient is φ = 370650144.

The previous prime is 401537629. The next prime is 401537677. The reversal of 401537669 is 966735104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40157569 + 361380100 = 6337^2 + 19010^2 .

It is a cyclic number.

It is not a de Polignac number, because 401537669 - 2¹⁶ = 401472133 is a prime.

It is a super-2 number, since 2×401537669² = 322464999251907122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401537629) 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 in 3 ways as a sum of consecutive naturals, for example, 15443744 + ... + 15443769.

It is an arithmetic number, because the mean of its divisors is an integer number (108106299).

Almost surely, 2^401537669 is an apocalyptic number.

It is an amenable number.

401537669 is a deficient number, since it is larger than the sum of its proper divisors (30887527).

401537669 is a wasteful number, since it uses less digits than its factorization.

401537669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30887526.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 401537669 is about 20038.4048516842. The cubic root of 401537669 is about 737.7492293353.

The spelling of 401537669 in words is "four hundred one million, five hundred thirty-seven thousand, six hundred sixty-nine".