427743729493 has 4 divisors (see below), whose sum is σ = 427745233440. Its totient is φ = 427742225548.

The previous prime is 427743729487. The next prime is 427743729503. The reversal of 427743729493 is 394927347724.

It is a happy number.

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 427743729493 - 2²¹ = 427741632341 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 (427743729463) 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, 180673 + ... + 942406.

It is an arithmetic number, because the mean of its divisors is an integer number (106936308360).

Almost surely, 2^427743729493 is an apocalyptic number.

It is an amenable number.

427743729493 is a deficient number, since it is larger than the sum of its proper divisors (1503947).

427743729493 is a wasteful number, since it uses less digits than its factorization.

427743729493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503946.

The product of its digits is 64012032, while the sum is 61.

The spelling of 427743729493 in words is "four hundred twenty-seven billion, seven hundred forty-three million, seven hundred twenty-nine thousand, four hundred ninety-three".