723231641 has 6 divisors (see below), whose sum is σ = 794957226. Its totient is φ = 657483200.

The previous prime is 723231583. The next prime is 723231671. The reversal of 723231641 is 146132327.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 465308041 + 257923600 = 21571^2 + 16060^2 .

It is not a de Polignac number, because 723231641 - 2¹⁰ = 723230617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723231671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2988440 + ... + 2988681.

It is an arithmetic number, because the mean of its divisors is an integer number (132492871).

Almost surely, 2^723231641 is an apocalyptic number.

It is an amenable number.

723231641 is a deficient number, since it is larger than the sum of its proper divisors (71725585).

723231641 is a wasteful number, since it uses less digits than its factorization.

723231641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5977143 (or 5977132 counting only the distinct ones).

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

The square root of 723231641 is about 26892.9663852837. The cubic root of 723231641 is about 897.6199009589.

Adding to 723231641 its reverse (146132327), we get a palindrome (869363968).

The spelling of 723231641 in words is "seven hundred twenty-three million, two hundred thirty-one thousand, six hundred forty-one".