64061731 has 2 divisors, whose sum is σ = 64061732. Its totient is φ = 64061730.

The previous prime is 64061707. The next prime is 64061743. The reversal of 64061731 is 13716046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64061731 - 2¹¹ = 64059683 is a prime.

It is a super-2 number, since 2×64061731² = 8207810757432722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64061731.

It is not a weakly prime, because it can be changed into another prime (64061761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32030865 + 32030866.

It is an arithmetic number, because the mean of its divisors is an integer number (32030866).

Almost surely, 2^64061731 is an apocalyptic number.

64061731 is a deficient number, since it is larger than the sum of its proper divisors (1).

64061731 is an equidigital number, since it uses as much as digits as its factorization.

64061731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 64061731 is about 8003.8572575977. The cubic root of 64061731 is about 400.1285649232.

Adding to 64061731 its reverse (13716046), we get a palindrome (77777777).

The spelling of 64061731 in words is "sixty-four million, sixty-one thousand, seven hundred thirty-one".