427923239309 has 4 divisors (see below), whose sum is σ = 427924702560. Its totient is φ = 427921776060.

The previous prime is 427923239297. The next prime is 427923239323. The reversal of 427923239309 is 903932329724.

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 a de Polignac number, because none of the positive numbers 2^k-427923239309 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 (427923839309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125657 + ... + 933614.

It is an arithmetic number, because the mean of its divisors is an integer number (106981175640).

Almost surely, 2^427923239309 is an apocalyptic number.

It is an amenable number.

427923239309 is a deficient number, since it is larger than the sum of its proper divisors (1463251).

427923239309 is a wasteful number, since it uses less digits than its factorization.

427923239309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463250.

The product of its (nonzero) digits is 4408992, while the sum is 53.

The spelling of 427923239309 in words is "four hundred twenty-seven billion, nine hundred twenty-three million, two hundred thirty-nine thousand, three hundred nine".