406563947 has 4 divisors (see below), whose sum is σ = 406627296. Its totient is φ = 406500600.

The previous prime is 406563931. The next prime is 406563961. The reversal of 406563947 is 749365604.

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 406563947 - 2⁴ = 406563931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406563898 and 406563907.

It is not an unprimeable number, because it can be changed into a prime (406563917) 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, 20804 + ... + 35297.

It is an arithmetic number, because the mean of its divisors is an integer number (101656824).

Almost surely, 2^406563947 is an apocalyptic number.

406563947 is a deficient number, since it is larger than the sum of its proper divisors (63349).

406563947 is an equidigital number, since it uses as much as digits as its factorization.

406563947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63348.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 406563947 is about 20163.4309332514. The cubic root of 406563947 is about 740.8147509015.

The spelling of 406563947 in words is "four hundred six million, five hundred sixty-three thousand, nine hundred forty-seven".