64198619 has 2 divisors, whose sum is σ = 64198620. Its totient is φ = 64198618.

The previous prime is 64198597. The next prime is 64198633. The reversal of 64198619 is 91689146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64198619 - 2¹² = 64194523 is a prime.

It is a super-2 number, since 2×64198619² = 8242925363014322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64198619.

It is not a weakly prime, because it can be changed into another prime (64198669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32099309 + 32099310.

It is an arithmetic number, because the mean of its divisors is an integer number (32099310).

Almost surely, 2^64198619 is an apocalyptic number.

64198619 is a deficient number, since it is larger than the sum of its proper divisors (1).

64198619 is an equidigital number, since it uses as much as digits as its factorization.

64198619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 64198619 is about 8012.4040711886. The cubic root of 64198619 is about 400.4133622653.

The spelling of 64198619 in words is "sixty-four million, one hundred ninety-eight thousand, six hundred nineteen".