64979429 has 2 divisors, whose sum is σ = 64979430. Its totient is φ = 64979428.

The previous prime is 64979419. The next prime is 64979443. The reversal of 64979429 is 92497946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36602500 + 28376929 = 6050^2 + 5327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64979429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64979419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32489714 + 32489715.

It is an arithmetic number, because the mean of its divisors is an integer number (32489715).

Almost surely, 2^64979429 is an apocalyptic number.

It is an amenable number.

64979429 is a deficient number, since it is larger than the sum of its proper divisors (1).

64979429 is an equidigital number, since it uses as much as digits as its factorization.

64979429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 64979429 is about 8060.9818880829. The cubic root of 64979429 is about 402.0301558197.

The spelling of 64979429 in words is "sixty-four million, nine hundred seventy-nine thousand, four hundred twenty-nine".