64991029 has 2 divisors, whose sum is σ = 64991030. Its totient is φ = 64991028.

The previous prime is 64990999. The next prime is 64991053. The reversal of 64991029 is 92019946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45832900 + 19158129 = 6770^2 + 4377^2 .

It is a cyclic number.

It is not a de Polignac number, because 64991029 - 2⁹ = 64990517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64990982 and 64991000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64991089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32495514 + 32495515.

It is an arithmetic number, because the mean of its divisors is an integer number (32495515).

Almost surely, 2^64991029 is an apocalyptic number.

It is an amenable number.

64991029 is a deficient number, since it is larger than the sum of its proper divisors (1).

64991029 is an equidigital number, since it uses as much as digits as its factorization.

64991029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 64991029 is about 8061.7013712987. The cubic root of 64991029 is about 402.0540776075.

The spelling of 64991029 in words is "sixty-four million, nine hundred ninety-one thousand, twenty-nine".