406619 has 4 divisors (see below), whose sum is σ = 428040. Its totient is φ = 385200.

The previous prime is 406591. The next prime is 406631. The reversal of 406619 is 916604.

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 406619 - 2¹⁶ = 341083 is a prime.

It is a super-2 number, since 2×406619² = 330678022322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406649) 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, 10682 + ... + 10719.

It is an arithmetic number, because the mean of its divisors is an integer number (107010).

2⁴⁰⁶⁶¹⁹ is an apocalyptic number.

406619 is a deficient number, since it is larger than the sum of its proper divisors (21421).

406619 is a wasteful number, since it uses less digits than its factorization.

406619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21420.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 406619 is about 637.6668409130. Note that the first 3 decimals coincide. The cubic root of 406619 is about 74.0848187408.

The spelling of 406619 in words is "four hundred six thousand, six hundred nineteen".