723020651 has 16 divisors (see below), whose sum is σ = 744564096. Its totient is φ = 701887296.

The previous prime is 723020629. The next prime is 723020671. The reversal of 723020651 is 156020327.

It is a cyclic number.

It is not a de Polignac number, because 723020651 - 2¹⁸ = 722758507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 723020651.

It is not an unprimeable number, because it can be changed into a prime (723020611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2083460 + ... + 2083806.

It is an arithmetic number, because the mean of its divisors is an integer number (46535256).

Almost surely, 2^723020651 is an apocalyptic number.

723020651 is a deficient number, since it is larger than the sum of its proper divisors (21543445).

723020651 is a wasteful number, since it uses less digits than its factorization.

723020651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 723020651 is about 26889.0433262323. The cubic root of 723020651 is about 897.5326042423.

Adding to 723020651 its reverse (156020327), we get a palindrome (879040978).

The spelling of 723020651 in words is "seven hundred twenty-three million, twenty thousand, six hundred fifty-one".