64939229 has 2 divisors, whose sum is σ = 64939230. Its totient is φ = 64939228.

The previous prime is 64939213. The next prime is 64939241. The reversal of 64939229 is 92293946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64480900 + 458329 = 8030^2 + 677^2 .

It is a cyclic number.

It is not a de Polignac number, because 64939229 - 2⁴ = 64939213 is a prime.

It is a super-2 number, since 2×64939229² = 8434206926228882, which contains 22 as substring.

It is a Sophie Germain prime.

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 64939229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64939279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32469614 + 32469615.

It is an arithmetic number, because the mean of its divisors is an integer number (32469615).

Almost surely, 2^64939229 is an apocalyptic number.

It is an amenable number.

64939229 is a deficient number, since it is larger than the sum of its proper divisors (1).

64939229 is an equidigital number, since it uses as much as digits as its factorization.

64939229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The square root of 64939229 is about 8058.4880095462. The cubic root of 64939229 is about 401.9472324162.

The spelling of 64939229 in words is "sixty-four million, nine hundred thirty-nine thousand, two hundred twenty-nine".