64919407 has 8 divisors (see below), whose sum is σ = 74272032. Its totient is φ = 55586400.

The previous prime is 64919399. The next prime is 64919417. The reversal of 64919407 is 70491946.

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 64919407 - 2³ = 64919399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64919407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64919417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3057 + ... + 11797.

It is an arithmetic number, because the mean of its divisors is an integer number (9284004).

Almost surely, 2^64919407 is an apocalyptic number.

64919407 is a deficient number, since it is larger than the sum of its proper divisors (9352625).

64919407 is a wasteful number, since it uses less digits than its factorization.

64919407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9809.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 64919407 is about 8057.2580323582. The cubic root of 64919407 is about 401.9063315670.

The spelling of 64919407 in words is "sixty-four million, nine hundred nineteen thousand, four hundred seven".