427240803621 has 4 divisors (see below), whose sum is σ = 569654404832. Its totient is φ = 284827202412.

The previous prime is 427240803611. The next prime is 427240803641. The reversal of 427240803621 is 126308042724.

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 not a de Polignac number, because 427240803621 - 2⁶ = 427240803557 is a prime.

It is a super-5 number, since 5×427240803621⁵ (a number of 59 digits) contains 55555 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427240803621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427240803611) 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, 71206800601 + ... + 71206800606.

It is an arithmetic number, because the mean of its divisors is an integer number (142413601208).

Almost surely, 2^427240803621 is an apocalyptic number.

It is an amenable number.

427240803621 is a deficient number, since it is larger than the sum of its proper divisors (142413601211).

427240803621 is a wasteful number, since it uses less digits than its factorization.

427240803621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142413601210.

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 427240803621 in words is "four hundred twenty-seven billion, two hundred forty million, eight hundred three thousand, six hundred twenty-one".