64208749 has 12 divisors (see below), whose sum is σ = 70787808. Its totient is φ = 57759200.

The previous prime is 64208741. The next prime is 64208791. The reversal of 64208749 is 94780246.

It is not a de Polignac number, because 64208749 - 2³ = 64208741 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 (64208741) 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 11 ways as a sum of consecutive naturals, for example, 206304 + ... + 206614.

It is an arithmetic number, because the mean of its divisors is an integer number (5898984).

Almost surely, 2^64208749 is an apocalyptic number.

It is an amenable number.

64208749 is a deficient number, since it is larger than the sum of its proper divisors (6579059).

64208749 is a wasteful number, since it uses less digits than its factorization.

64208749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 64208749 is about 8013.0361911076. The cubic root of 64208749 is about 400.4344217735.

The spelling of 64208749 in words is "sixty-four million, two hundred eight thousand, seven hundred forty-nine".