64450249 has 4 divisors (see below), whose sum is σ = 65949136. Its totient is φ = 62951364.

The previous prime is 64450231. The next prime is 64450259. The reversal of 64450249 is 94205446.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64450249 - 2²³ = 56061641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64450229) 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 3 ways as a sum of consecutive naturals, for example, 749379 + ... + 749464.

It is an arithmetic number, because the mean of its divisors is an integer number (16487284).

Almost surely, 2^64450249 is an apocalyptic number.

It is an amenable number.

64450249 is a deficient number, since it is larger than the sum of its proper divisors (1498887).

64450249 is a wasteful number, since it uses less digits than its factorization.

64450249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498886.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 64450249 is about 8028.0912426305. The cubic root of 64450249 is about 400.9358276093.

The spelling of 64450249 in words is "sixty-four million, four hundred fifty thousand, two hundred forty-nine".