64072919 has 8 divisors (see below), whose sum is σ = 67534560. Its totient is φ = 60694816.

The previous prime is 64072909. The next prime is 64072933. The reversal of 64072919 is 91927046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64072919 is a prime.

It is a super-2 number, since 2×64072919² = 8210677898361122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64072909) 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, 19307 + ... + 22380.

It is an arithmetic number, because the mean of its divisors is an integer number (8441820).

Almost surely, 2^64072919 is an apocalyptic number.

64072919 is a deficient number, since it is larger than the sum of its proper divisors (3461641).

64072919 is a wasteful number, since it uses less digits than its factorization.

64072919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41769.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 64072919 is about 8004.5561400992. The cubic root of 64072919 is about 400.1518569247.

The spelling of 64072919 in words is "sixty-four million, seventy-two thousand, nine hundred nineteen".