64723854 has 32 divisors (see below), whose sum is σ = 139948704. Its totient is φ = 19837440.

The previous prime is 64723849. The next prime is 64723859. The reversal of 64723854 is 45832746.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64723849) and next prime (64723859).

It is a super-2 number, since 2×64723854² = 8378354553226632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64723859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20442 + ... + 23394.

It is an arithmetic number, because the mean of its divisors is an integer number (4373397).

Almost surely, 2^64723854 is an apocalyptic number.

64723854 is an abundant number, since it is smaller than the sum of its proper divisors (75224850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64723854 is a wasteful number, since it uses less digits than its factorization.

64723854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252.

The product of its digits is 161280, while the sum is 39.

The square root of 64723854 is about 8045.1136722858. The cubic root of 64723854 is about 401.5023792434.

The spelling of 64723854 in words is "sixty-four million, seven hundred twenty-three thousand, eight hundred fifty-four".