421947949 has 8 divisors (see below), whose sum is σ = 450533952. Its totient is φ = 394215360.

The previous prime is 421947947. The next prime is 421947961. The reversal of 421947949 is 949749124.

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 421947949 - 2¹ = 421947947 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 (421947943) 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, 212332 + ... + 214309.

It is an arithmetic number, because the mean of its divisors is an integer number (56316744).

Almost surely, 2^421947949 is an apocalyptic number.

It is an amenable number.

421947949 is a deficient number, since it is larger than the sum of its proper divisors (28586003).

421947949 is a wasteful number, since it uses less digits than its factorization.

421947949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426707.

The product of its digits is 653184, while the sum is 49.

The square root of 421947949 is about 20541.3716435880. The cubic root of 421947949 is about 750.0432265456.

The spelling of 421947949 in words is "four hundred twenty-one million, nine hundred forty-seven thousand, nine hundred forty-nine".