64763121 has 4 divisors (see below), whose sum is σ = 86350832. Its totient is φ = 43175412.

The previous prime is 64763099. The next prime is 64763131. The reversal of 64763121 is 12136746.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64763121 - 2⁵ = 64763089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64763131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10793851 + ... + 10793856.

It is an arithmetic number, because the mean of its divisors is an integer number (21587708).

Almost surely, 2^64763121 is an apocalyptic number.

It is an amenable number.

64763121 is a deficient number, since it is larger than the sum of its proper divisors (21587711).

64763121 is a wasteful number, since it uses less digits than its factorization.

64763121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21587710.

The product of its digits is 6048, while the sum is 30.

The square root of 64763121 is about 8047.5537276864. The cubic root of 64763121 is about 401.5835580038.

Adding to 64763121 its reverse (12136746), we get a palindrome (76899867).

The spelling of 64763121 in words is "sixty-four million, seven hundred sixty-three thousand, one hundred twenty-one".