409939131607 has 4 divisors (see below), whose sum is σ = 413919123280. Its totient is φ = 405959139936.

The previous prime is 409939131599. The next prime is 409939131619. The reversal of 409939131607 is 706131939904.

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 409939131607 - 2³ = 409939131599 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 (409939134607) 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, 1989995682 + ... + 1989995887.

It is an arithmetic number, because the mean of its divisors is an integer number (103479780820).

Almost surely, 2^409939131607 is an apocalyptic number.

409939131607 is a deficient number, since it is larger than the sum of its proper divisors (3979991673).

409939131607 is a wasteful number, since it uses less digits than its factorization.

409939131607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979991672.

The product of its (nonzero) digits is 1102248, while the sum is 52.

The spelling of 409939131607 in words is "four hundred nine billion, nine hundred thirty-nine million, one hundred thirty-one thousand, six hundred seven".