64890727 has 6 divisors (see below), whose sum is σ = 71326304. Its totient is φ = 58991460.

The previous prime is 64890677. The next prime is 64890731. The reversal of 64890727 is 72709846.

It is not a de Polignac number, because 64890727 - 2⁷ = 64890599 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 (64891727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 268023 + ... + 268264.

Almost surely, 2^64890727 is an apocalyptic number.

64890727 is a deficient number, since it is larger than the sum of its proper divisors (6435577).

64890727 is a wasteful number, since it uses less digits than its factorization.

64890727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536309 (or 536298 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 64890727 is about 8055.4780739569. The cubic root of 64890727 is about 401.8471383203.

The spelling of 64890727 in words is "sixty-four million, eight hundred ninety thousand, seven hundred twenty-seven".