64242737 has 4 divisors (see below), whose sum is σ = 69184500. Its totient is φ = 59300976.

The previous prime is 64242733. The next prime is 64242751. The reversal of 64242737 is 73724246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32444416 + 31798321 = 5696^2 + 5639^2 .

It is a cyclic number.

It is not a de Polignac number, because 64242737 - 2² = 64242733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64242697 and 64242706.

It is not an unprimeable number, because it can be changed into a prime (64242733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2470862 + ... + 2470887.

It is an arithmetic number, because the mean of its divisors is an integer number (17296125).

Almost surely, 2^64242737 is an apocalyptic number.

It is an amenable number.

64242737 is a deficient number, since it is larger than the sum of its proper divisors (4941763).

64242737 is a wasteful number, since it uses less digits than its factorization.

64242737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941762.

The product of its digits is 56448, while the sum is 35.

The square root of 64242737 is about 8015.1567046440. The cubic root of 64242737 is about 400.5050640906.

The spelling of 64242737 in words is "sixty-four million, two hundred forty-two thousand, seven hundred thirty-seven".