64938249 has 12 divisors (see below), whose sum is σ = 99317556. Its totient is φ = 40745472.

The previous prime is 64938241. The next prime is 64938271. The reversal of 64938249 is 94283946.

It can be written as a sum of positive squares in 2 ways, for example, as 18766224 + 46172025 = 4332^2 + 6795^2 .

It is not a de Polignac number, because 64938249 - 2³ = 64938241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64938241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212064 + ... + 212369.

It is an arithmetic number, because the mean of its divisors is an integer number (8276463).

Almost surely, 2^64938249 is an apocalyptic number.

It is an amenable number.

64938249 is a deficient number, since it is larger than the sum of its proper divisors (34379307).

64938249 is a wasteful number, since it uses less digits than its factorization.

64938249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424456 (or 424453 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 64938249 is about 8058.4272038655. The cubic root of 64938249 is about 401.9452104731.

The spelling of 64938249 in words is "sixty-four million, nine hundred thirty-eight thousand, two hundred forty-nine".