405602013 has 4 divisors (see below), whose sum is σ = 540802688. Its totient is φ = 270401340.

The previous prime is 405601991. The next prime is 405602023. The reversal of 405602013 is 310206504.

It is a happy number.

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 not a de Polignac number, because 405602013 - 2⁵ = 405601981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405602023) 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, 67600333 + ... + 67600338.

It is an arithmetic number, because the mean of its divisors is an integer number (135200672).

Almost surely, 2^405602013 is an apocalyptic number.

It is an amenable number.

405602013 is a deficient number, since it is larger than the sum of its proper divisors (135200675).

405602013 is a wasteful number, since it uses less digits than its factorization.

405602013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135200674.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 405602013 is about 20139.5633765978. The cubic root of 405602013 is about 740.2300313598.

Adding to 405602013 its reverse (310206504), we get a palindrome (715808517).

The spelling of 405602013 in words is "four hundred five million, six hundred two thousand, thirteen".