64649429 has 6 divisors (see below), whose sum is σ = 70005186. Its totient is φ = 59676240.

The previous prime is 64649423. The next prime is 64649437. The reversal of 64649429 is 92494646.

It can be written as a sum of positive squares in 3 ways, for example, as 280900 + 64368529 = 530^2 + 8023^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64649429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64649429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64649423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 191102 + ... + 191439.

It is an arithmetic number, because the mean of its divisors is an integer number (11667531).

Almost surely, 2^64649429 is an apocalyptic number.

It is an amenable number.

64649429 is a deficient number, since it is larger than the sum of its proper divisors (5355757).

64649429 is a wasteful number, since it uses less digits than its factorization.

64649429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382567 (or 382554 counting only the distinct ones).

The product of its digits is 373248, while the sum is 44.

The square root of 64649429 is about 8040.4868633684. The cubic root of 64649429 is about 401.3484263415.

The spelling of 64649429 in words is "sixty-four million, six hundred forty-nine thousand, four hundred twenty-nine".