64977723 has 24 divisors (see below), whose sum is σ = 99684000. Its totient is φ = 40644864.

The previous prime is 64977721. The next prime is 64977727. The reversal of 64977723 is 32777946.

It is a happy number.

It is not a de Polignac number, because 64977723 - 2¹ = 64977721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64977721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91293 + ... + 92001.

It is an arithmetic number, because the mean of its divisors is an integer number (4153500).

Almost surely, 2^64977723 is an apocalyptic number.

64977723 is a deficient number, since it is larger than the sum of its proper divisors (34706277).

64977723 is a wasteful number, since it uses less digits than its factorization.

64977723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331 (or 1328 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The square root of 64977723 is about 8060.8760690138. The cubic root of 64977723 is about 402.0266374270.

The spelling of 64977723 in words is "sixty-four million, nine hundred seventy-seven thousand, seven hundred twenty-three".