420199997 has 8 divisors (see below), whose sum is σ = 481615296. Its totient is φ = 359131392.

The previous prime is 420199993. The next prime is 420200017. The reversal of 420199997 is 799991024.

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 420199997 - 2² = 420199993 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 (420199993) 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, 84068 + ... + 88925.

It is an arithmetic number, because the mean of its divisors is an integer number (60201912).

Almost surely, 2^420199997 is an apocalyptic number.

It is an amenable number.

420199997 is a deficient number, since it is larger than the sum of its proper divisors (61415299).

420199997 is a wasteful number, since it uses less digits than its factorization.

420199997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173347.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 420199997 is about 20498.7803783542. The cubic root of 420199997 is about 749.0060890662.

The spelling of 420199997 in words is "four hundred twenty million, one hundred ninety-nine thousand, nine hundred ninety-seven".