64490279 has 8 divisors (see below), whose sum is σ = 73779360. Its totient is φ = 55220256.

The previous prime is 64490273. The next prime is 64490303. The reversal of 64490279 is 97209446.

64490279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-64490279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64490273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3437 + ... + 11865.

It is an arithmetic number, because the mean of its divisors is an integer number (9222420).

Almost surely, 2^64490279 is an apocalyptic number.

64490279 is a deficient number, since it is larger than the sum of its proper divisors (9289081).

64490279 is a wasteful number, since it uses less digits than its factorization.

64490279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9529.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 64490279 is about 8030.5839762747. The cubic root of 64490279 is about 401.0188174079.

The spelling of 64490279 in words is "sixty-four million, four hundred ninety thousand, two hundred seventy-nine".