64240849 has 4 divisors (see below), whose sum is σ = 64545520. Its totient is φ = 63936180.

The previous prime is 64240837. The next prime is 64240859. The reversal of 64240849 is 94804246.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94804246 = 2 ⋅47402123.

It is a cyclic number.

It is not a de Polignac number, because 64240849 - 2⁷ = 64240721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64240819) 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, 152019 + ... + 152440.

It is an arithmetic number, because the mean of its divisors is an integer number (16136380).

Almost surely, 2^64240849 is an apocalyptic number.

It is an amenable number.

64240849 is a deficient number, since it is larger than the sum of its proper divisors (304671).

64240849 is a wasteful number, since it uses less digits than its factorization.

64240849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304670.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 64240849 is about 8015.0389269173. The cubic root of 64240849 is about 400.5011406330.

The spelling of 64240849 in words is "sixty-four million, two hundred forty thousand, eight hundred forty-nine".