9649723 has 4 divisors (see below), whose sum is σ = 9677880. Its totient is φ = 9621568.

The previous prime is 9649669. The next prime is 9649729. The reversal of 9649723 is 3279469.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3279469 = 227 ⋅14447.

It is a cyclic number.

It is not a de Polignac number, because 9649723 - 2¹⁷ = 9518651 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

9649723 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9649729) 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, 13558 + ... + 14251.

It is an arithmetic number, because the mean of its divisors is an integer number (2419470).

Almost surely, 2^9649723 is an apocalyptic number.

9649723 is a deficient number, since it is larger than the sum of its proper divisors (28157).

9649723 is a wasteful number, since it uses less digits than its factorization.

9649723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28156.

The product of its digits is 81648, while the sum is 40.

The square root of 9649723 is about 3106.4003283543. The cubic root of 9649723 is about 212.8980166713.

The spelling of 9649723 in words is "nine million, six hundred forty-nine thousand, seven hundred twenty-three".