723847489 has 4 divisors (see below), whose sum is σ = 747197440. Its totient is φ = 700497540.

The previous prime is 723847483. The next prime is 723847493. The reversal of 723847489 is 984748327.

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, and also an emirpimes, since its reverse is a distinct semiprime: 984748327 = 17419 ⋅56533.

It is a cyclic number.

It is not a de Polignac number, because 723847489 - 2²³ = 715458881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723847483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11674929 + ... + 11674990.

It is an arithmetic number, because the mean of its divisors is an integer number (186799360).

Almost surely, 2^723847489 is an apocalyptic number.

It is an amenable number.

723847489 is a deficient number, since it is larger than the sum of its proper divisors (23349951).

723847489 is a wasteful number, since it uses less digits than its factorization.

723847489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23349950.

The product of its digits is 2709504, while the sum is 52.

The square root of 723847489 is about 26904.4139315466. The cubic root of 723847489 is about 897.8746098503.

The spelling of 723847489 in words is "seven hundred twenty-three million, eight hundred forty-seven thousand, four hundred eighty-nine".