64693901 has 2 divisors, whose sum is σ = 64693902. Its totient is φ = 64693900.

The previous prime is 64693897. The next prime is 64693903. The reversal of 64693901 is 10939646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50055625 + 14638276 = 7075^2 + 3826^2 .

It is a cyclic number.

It is not a de Polignac number, because 64693901 - 2² = 64693897 is a prime.

It is a Sophie Germain prime.

Together with 64693903, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64693903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32346950 + 32346951.

It is an arithmetic number, because the mean of its divisors is an integer number (32346951).

Almost surely, 2^64693901 is an apocalyptic number.

It is an amenable number.

64693901 is a deficient number, since it is larger than the sum of its proper divisors (1).

64693901 is an equidigital number, since it uses as much as digits as its factorization.

64693901 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 38.

The square root of 64693901 is about 8043.2518921143. The cubic root of 64693901 is about 401.4404337336.

The spelling of 64693901 in words is "sixty-four million, six hundred ninety-three thousand, nine hundred one".