64671419 has 2 divisors, whose sum is σ = 64671420. Its totient is φ = 64671418.

The previous prime is 64671413. The next prime is 64671433. The reversal of 64671419 is 91417646.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64671419 - 2¹⁶ = 64605883 is a prime.

It is a super-2 number, since 2×64671419² = 8364784870947122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64671413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32335709 + 32335710.

It is an arithmetic number, because the mean of its divisors is an integer number (32335710).

Almost surely, 2^64671419 is an apocalyptic number.

64671419 is a deficient number, since it is larger than the sum of its proper divisors (1).

64671419 is an equidigital number, since it uses as much as digits as its factorization.

64671419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 64671419 is about 8041.8542016130. The cubic root of 64671419 is about 401.3939263640.

The spelling of 64671419 in words is "sixty-four million, six hundred seventy-one thousand, four hundred nineteen".