64244149 has 4 divisors (see below), whose sum is σ = 67625440. Its totient is φ = 60862860.

The previous prime is 64244101. The next prime is 64244197. The reversal of 64244149 is 94144246.

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 an interprime number because it is at equal distance from previous prime (64244101) and next prime (64244197).

It is a cyclic number.

It is not a de Polignac number, because 64244149 - 2¹⁹ = 63719861 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 (64244249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1690617 + ... + 1690654.

It is an arithmetic number, because the mean of its divisors is an integer number (16906360).

Almost surely, 2^64244149 is an apocalyptic number.

It is an amenable number.

64244149 is a deficient number, since it is larger than the sum of its proper divisors (3381291).

64244149 is a wasteful number, since it uses less digits than its factorization.

64244149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381290.

The product of its digits is 27648, while the sum is 34.

The square root of 64244149 is about 8015.2447872788. The cubic root of 64244149 is about 400.5079983211.

The spelling of 64244149 in words is "sixty-four million, two hundred forty-four thousand, one hundred forty-nine".