64122791 has 2 divisors, whose sum is σ = 64122792. Its totient is φ = 64122790.

The previous prime is 64122769. The next prime is 64122833. The reversal of 64122791 is 19722146.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64122791 - 2¹⁴ = 64106407 is a prime.

It is a super-2 number, since 2×64122791² = 8223464651259362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64122731) 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 as a sum of consecutive naturals, namely, 32061395 + 32061396.

It is an arithmetic number, because the mean of its divisors is an integer number (32061396).

Almost surely, 2^64122791 is an apocalyptic number.

64122791 is a deficient number, since it is larger than the sum of its proper divisors (1).

64122791 is an equidigital number, since it uses as much as digits as its factorization.

64122791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 64122791 is about 8007.6707599651. The cubic root of 64122791 is about 400.2556511547.

It can be divided in two parts, 641 and 22791, that added together give a palindrome (23432).

The spelling of 64122791 in words is "sixty-four million, one hundred twenty-two thousand, seven hundred ninety-one".