406777321 has 4 divisors (see below), whose sum is σ = 409050000. Its totient is φ = 404504644.

The previous prime is 406777307. The next prime is 406777331. The reversal of 406777321 is 123777604.

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 a cyclic number.

It is not a de Polignac number, because 406777321 - 2⁷ = 406777193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406777331) 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, 1136071 + ... + 1136428.

It is an arithmetic number, because the mean of its divisors is an integer number (102262500).

Almost surely, 2^406777321 is an apocalyptic number.

It is an amenable number.

406777321 is a deficient number, since it is larger than the sum of its proper divisors (2272679).

406777321 is a wasteful number, since it uses less digits than its factorization.

406777321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272678.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 406777321 is about 20168.7213526292. The cubic root of 406777321 is about 740.9443270422.

The spelling of 406777321 in words is "four hundred six million, seven hundred seventy-seven thousand, three hundred twenty-one".