64198421 has 8 divisors (see below), whose sum is σ = 73434240. Its totient is φ = 54978768.

The previous prime is 64198417. The next prime is 64198447. The reversal of 64198421 is 12489146.

It is a happy number.

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 64198421 - 2² = 64198417 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 (64198411) 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, 6215 + ... + 12923.

It is an arithmetic number, because the mean of its divisors is an integer number (9179280).

Almost surely, 2^64198421 is an apocalyptic number.

It is an amenable number.

64198421 is a deficient number, since it is larger than the sum of its proper divisors (9235819).

64198421 is a wasteful number, since it uses less digits than its factorization.

64198421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8083.

The product of its digits is 13824, while the sum is 35.

The square root of 64198421 is about 8012.3917153369. The cubic root of 64198421 is about 400.4129506161.

The spelling of 64198421 in words is "sixty-four million, one hundred ninety-eight thousand, four hundred twenty-one".