406109407 has 4 divisors (see below), whose sum is σ = 443028456. Its totient is φ = 369190360.

The previous prime is 406109381. The next prime is 406109419. The reversal of 406109407 is 704901604.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 406109407 - 2¹⁵ = 406076639 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 (406109467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18459508 + ... + 18459529.

It is an arithmetic number, because the mean of its divisors is an integer number (110757114).

Almost surely, 2^406109407 is an apocalyptic number.

406109407 is a deficient number, since it is larger than the sum of its proper divisors (36919049).

406109407 is a wasteful number, since it uses less digits than its factorization.

406109407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36919048.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 406109407 is about 20152.1563858561. The cubic root of 406109407 is about 740.5385700728.

The spelling of 406109407 in words is "four hundred six million, one hundred nine thousand, four hundred seven".