421306447477 has 8 divisors (see below), whose sum is σ = 425508472064. Its totient is φ = 417106570608.

The previous prime is 421306447459. The next prime is 421306447483. The reversal of 421306447477 is 774744603124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421306447477 is a prime.

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 421306447477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421306447487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141198 + ... + 928735.

It is an arithmetic number, because the mean of its divisors is an integer number (53188559008).

Almost surely, 2^421306447477 is an apocalyptic number.

It is an amenable number.

421306447477 is a deficient number, since it is larger than the sum of its proper divisors (4202024587).

421306447477 is a wasteful number, since it uses less digits than its factorization.

421306447477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073859.

The product of its (nonzero) digits is 3161088, while the sum is 49.

The spelling of 421306447477 in words is "four hundred twenty-one billion, three hundred six million, four hundred forty-seven thousand, four hundred seventy-seven".