407642905 has 4 divisors (see below), whose sum is σ = 489171492. Its totient is φ = 326114320.

The previous prime is 407642903. The next prime is 407642909. The reversal of 407642905 is 509246704.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42680089 + 364962816 = 6533^2 + 19104^2 .

It is not a de Polignac number, because 407642905 - 2¹ = 407642903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (407642903) 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, 40764286 + ... + 40764295.

It is an arithmetic number, because the mean of its divisors is an integer number (122292873).

Almost surely, 2^407642905 is an apocalyptic number.

It is an amenable number.

407642905 is a deficient number, since it is larger than the sum of its proper divisors (81528587).

407642905 is an equidigital number, since it uses as much as digits as its factorization.

407642905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81528586.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 407642905 is about 20190.1685233185. The cubic root of 407642905 is about 741.4695080588.

The spelling of 407642905 in words is "four hundred seven million, six hundred forty-two thousand, nine hundred five".