400109641 has 4 divisors (see below), whose sum is σ = 405174400. Its totient is φ = 395044884.

The previous prime is 400109629. The next prime is 400109669. The reversal of 400109641 is 146901004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400109641 - 2¹¹ = 400107593 is a prime.

It is a super-2 number, since 2×400109641² = 320175449642297762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400109141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2532261 + ... + 2532418.

It is an arithmetic number, because the mean of its divisors is an integer number (101293600).

Almost surely, 2^400109641 is an apocalyptic number.

It is an amenable number.

400109641 is a deficient number, since it is larger than the sum of its proper divisors (5064759).

400109641 is an equidigital number, since it uses as much as digits as its factorization.

400109641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064758.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 400109641 is about 20002.7408371953. The cubic root of 400109641 is about 736.8736137277.

The spelling of 400109641 in words is "four hundred million, one hundred nine thousand, six hundred forty-one".