406506493 has 8 divisors (see below), whose sum is σ = 410160960. Its totient is φ = 402860640.

The previous prime is 406506491. The next prime is 406506497. The reversal of 406506493 is 394605604.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 406506493 - 2¹ = 406506491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406506491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125073 + ... + 128281.

It is an arithmetic number, because the mean of its divisors is an integer number (51270120).

Almost surely, 2^406506493 is an apocalyptic number.

It is an amenable number.

406506493 is a deficient number, since it is larger than the sum of its proper divisors (3654467).

406506493 is a wasteful number, since it uses less digits than its factorization.

406506493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 406506493 is about 20162.0061749817. The cubic root of 406506493 is about 740.7798529261.

The spelling of 406506493 in words is "four hundred six million, five hundred six thousand, four hundred ninety-three".