64747957 has 4 divisors (see below), whose sum is σ = 65845440. Its totient is φ = 63650476.

The previous prime is 64747939. The next prime is 64747987. The reversal of 64747957 is 75974746.

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 64747957 - 2¹¹ = 64745909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64747957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64747937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548653 + ... + 548770.

It is an arithmetic number, because the mean of its divisors is an integer number (16461360).

Almost surely, 2^64747957 is an apocalyptic number.

It is an amenable number.

64747957 is a deficient number, since it is larger than the sum of its proper divisors (1097483).

64747957 is a wasteful number, since it uses less digits than its factorization.

64747957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097482.

The product of its digits is 1481760, while the sum is 49.

The square root of 64747957 is about 8046.6115228710. The cubic root of 64747957 is about 401.5522125492.

The spelling of 64747957 in words is "sixty-four million, seven hundred forty-seven thousand, nine hundred fifty-seven".