64723061 has 4 divisors (see below), whose sum is σ = 69701772. Its totient is φ = 59744352.

The previous prime is 64723031. The next prime is 64723069. The reversal of 64723061 is 16032746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16032746 = 2 ⋅8016373.

It can be written as a sum of positive squares in 2 ways, for example, as 15288100 + 49434961 = 3910^2 + 7031^2 .

It is a cyclic number.

It is not a de Polignac number, because 64723061 - 2⁶ = 64722997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64723069) 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, 2489336 + ... + 2489361.

It is an arithmetic number, because the mean of its divisors is an integer number (17425443).

Almost surely, 2^64723061 is an apocalyptic number.

It is an amenable number.

64723061 is a deficient number, since it is larger than the sum of its proper divisors (4978711).

64723061 is a wasteful number, since it uses less digits than its factorization.

64723061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978710.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 64723061 is about 8045.0643875609. The cubic root of 64723061 is about 401.5007394941.

The spelling of 64723061 in words is "sixty-four million, seven hundred twenty-three thousand, sixty-one".