64973797 has 4 divisors (see below), whose sum is σ = 74255776. Its totient is φ = 55691820.

The previous prime is 64973771. The next prime is 64973803. The reversal of 64973797 is 79737946.

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 a cyclic number.

It is not a de Polignac number, because 64973797 - 2⁷ = 64973669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64973747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4640979 + ... + 4640992.

It is an arithmetic number, because the mean of its divisors is an integer number (18563944).

Almost surely, 2^64973797 is an apocalyptic number.

It is an amenable number.

64973797 is a deficient number, since it is larger than the sum of its proper divisors (9281979).

64973797 is an equidigital number, since it uses as much as digits as its factorization.

64973797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9281978.

The product of its digits is 2000376, while the sum is 52.

The square root of 64973797 is about 8060.6325434174. The cubic root of 64973797 is about 402.0185403526.

The spelling of 64973797 in words is "sixty-four million, nine hundred seventy-three thousand, seven hundred ninety-seven".