421944477 has 8 divisors (see below), whose sum is σ = 562689216. Its totient is φ = 281248032.

The previous prime is 421944473. The next prime is 421944491. The reversal of 421944477 is 774449124.

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

It is not a de Polignac number, because 421944477 - 2² = 421944473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421944473) 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, 22288 + ... + 36614.

It is an arithmetic number, because the mean of its divisors is an integer number (70336152).

Almost surely, 2^421944477 is an apocalyptic number.

It is an amenable number.

421944477 is a deficient number, since it is larger than the sum of its proper divisors (140744739).

421944477 is a wasteful number, since it uses less digits than its factorization.

421944477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24147.

The product of its digits is 225792, while the sum is 42.

The square root of 421944477 is about 20541.2871310441. The cubic root of 421944477 is about 750.0411692956.

The spelling of 421944477 in words is "four hundred twenty-one million, nine hundred forty-four thousand, four hundred seventy-seven".