64949497 has 8 divisors (see below), whose sum is σ = 65592072. Its totient is φ = 64310400.

The previous prime is 64949491. The next prime is 64949519. The reversal of 64949497 is 79494946.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3154176 + 61795321 = 1776^2 + 7861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64949497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64949491) 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 7 ways as a sum of consecutive naturals, for example, 50223 + ... + 51499.

It is an arithmetic number, because the mean of its divisors is an integer number (8199009).

Almost surely, 2^64949497 is an apocalyptic number.

It is an amenable number.

64949497 is a deficient number, since it is larger than the sum of its proper divisors (642575).

64949497 is a wasteful number, since it uses less digits than its factorization.

64949497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739.

The product of its digits is 1959552, while the sum is 52.

The square root of 64949497 is about 8059.1250765824. The cubic root of 64949497 is about 401.9684162046.

The spelling of 64949497 in words is "sixty-four million, nine hundred forty-nine thousand, four hundred ninety-seven".