427630021 has 8 divisors (see below), whose sum is σ = 526313984. Its totient is φ = 338344560.

The previous prime is 427630003. The next prime is 427630031. The reversal of 427630021 is 120036724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 427630021 - 2⁵ = 427629989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427630031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349525 + ... + 2349706.

It is an arithmetic number, because the mean of its divisors is an integer number (65789248).

Almost surely, 2^427630021 is an apocalyptic number.

It is an amenable number.

427630021 is a deficient number, since it is larger than the sum of its proper divisors (98683963).

427630021 is a wasteful number, since it uses less digits than its factorization.

427630021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4699251.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 427630021 is about 20679.2171273479. The cubic root of 427630021 is about 753.3949916684.

Adding to 427630021 its reverse (120036724), we get a palindrome (547666745).

The spelling of 427630021 in words is "four hundred twenty-seven million, six hundred thirty thousand, twenty-one".