64198397 has 8 divisors (see below), whose sum is σ = 67971360. Its totient is φ = 60464880.

The previous prime is 64198391. The next prime is 64198403. The reversal of 64198397 is 79389146.

It is an interprime number because it is at equal distance from previous prime (64198391) and next prime (64198403).

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 64198397 - 2²² = 60004093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64198391) 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, 6479 + ... + 13052.

It is an arithmetic number, because the mean of its divisors is an integer number (8496420).

Almost surely, 2^64198397 is an apocalyptic number.

It is an amenable number.

64198397 is a deficient number, since it is larger than the sum of its proper divisors (3772963).

64198397 is a wasteful number, since it uses less digits than its factorization.

64198397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19723.

The product of its digits is 326592, while the sum is 47.

The square root of 64198397 is about 8012.3902176567. The cubic root of 64198397 is about 400.4129007192.

The spelling of 64198397 in words is "sixty-four million, one hundred ninety-eight thousand, three hundred ninety-seven".