64060921 has 2 divisors, whose sum is σ = 64060922. Its totient is φ = 64060920.

The previous prime is 64060907. The next prime is 64060937. The reversal of 64060921 is 12906046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61465600 + 2595321 = 7840^2 + 1611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64060921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64060921.

It is not a weakly prime, because it can be changed into another prime (64060021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32030460 + 32030461.

It is an arithmetic number, because the mean of its divisors is an integer number (32030461).

Almost surely, 2^64060921 is an apocalyptic number.

It is an amenable number.

64060921 is a deficient number, since it is larger than the sum of its proper divisors (1).

64060921 is an equidigital number, since it uses as much as digits as its factorization.

64060921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 64060921 is about 8003.8066568352. The cubic root of 64060921 is about 400.1268785004.

Adding to 64060921 its reverse (12906046), we get a palindrome (76966967).

The spelling of 64060921 in words is "sixty-four million, sixty thousand, nine hundred twenty-one".