64961929 has 4 divisors (see below), whose sum is σ = 65558020. Its totient is φ = 64365840.

The previous prime is 64961881. The next prime is 64961977. The reversal of 64961929 is 92916946.

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

It is an interprime number because it is at equal distance from previous prime (64961881) and next prime (64961977).

It can be written as a sum of positive squares in 2 ways, for example, as 16687225 + 48274704 = 4085^2 + 6948^2 .

It is a cyclic number.

It is not a de Polignac number, because 64961929 - 2¹³ = 64953737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64961989) 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 3 ways as a sum of consecutive naturals, for example, 297882 + ... + 298099.

It is an arithmetic number, because the mean of its divisors is an integer number (16389505).

Almost surely, 2^64961929 is an apocalyptic number.

It is an amenable number.

64961929 is a deficient number, since it is larger than the sum of its proper divisors (596091).

64961929 is a wasteful number, since it uses less digits than its factorization.

64961929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596090.

The product of its digits is 209952, while the sum is 46.

The square root of 64961929 is about 8059.8963392838. The cubic root of 64961929 is about 401.9940615279.

The spelling of 64961929 in words is "sixty-four million, nine hundred sixty-one thousand, nine hundred twenty-nine".