406394377 has 4 divisors (see below), whose sum is σ = 406737936. Its totient is φ = 406050820.

The previous prime is 406394353. The next prime is 406394389. The reversal of 406394377 is 773493604.

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 406394377 - 2¹⁹ = 405870089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406394077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169999 + ... + 172372.

It is an arithmetic number, because the mean of its divisors is an integer number (101684484).

Almost surely, 2^406394377 is an apocalyptic number.

It is an amenable number.

406394377 is a deficient number, since it is larger than the sum of its proper divisors (343559).

406394377 is a wasteful number, since it uses less digits than its factorization.

406394377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343558.

The product of its (nonzero) digits is 381024, while the sum is 43.

The square root of 406394377 is about 20159.2256051665. The cubic root of 406394377 is about 740.7117433862.

The spelling of 406394377 in words is "four hundred six million, three hundred ninety-four thousand, three hundred seventy-seven".