420317949 has 4 divisors (see below), whose sum is σ = 560423936. Its totient is φ = 280211964.

The previous prime is 420317929. The next prime is 420317951. The reversal of 420317949 is 949713024.

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 420317949 - 2⁵ = 420317917 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 (420317929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70052989 + ... + 70052994.

It is an arithmetic number, because the mean of its divisors is an integer number (140105984).

Almost surely, 2^420317949 is an apocalyptic number.

It is an amenable number.

420317949 is a deficient number, since it is larger than the sum of its proper divisors (140105987).

420317949 is a wasteful number, since it uses less digits than its factorization.

420317949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140105986.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 420317949 is about 20501.6572256976. The cubic root of 420317949 is about 749.0761656184.

The spelling of 420317949 in words is "four hundred twenty million, three hundred seventeen thousand, nine hundred forty-nine".