400100135 has 4 divisors (see below), whose sum is σ = 480120168. Its totient is φ = 320080104.

The previous prime is 400100033. The next prime is 400100171. The reversal of 400100135 is 531001004.

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

It is a cyclic number.

It is not a de Polignac number, because 400100135 - 2²⁰ = 399051559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40010009 + ... + 40010018.

It is an arithmetic number, because the mean of its divisors is an integer number (120030042).

Almost surely, 2^400100135 is an apocalyptic number.

400100135 is a deficient number, since it is larger than the sum of its proper divisors (80020033).

400100135 is an equidigital number, since it uses as much as digits as its factorization.

400100135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80020032.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 400100135 is about 20002.5032183474. The cubic root of 400100135 is about 736.8677780139.

Adding to 400100135 its reverse (531001004), we get a palindrome (931101139).

The spelling of 400100135 in words is "four hundred million, one hundred thousand, one hundred thirty-five".