723242131 has 2 divisors, whose sum is σ = 723242132. Its totient is φ = 723242130.

The previous prime is 723242111. The next prime is 723242147. The reversal of 723242131 is 131242327.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 723242131 - 2⁹ = 723241619 is a prime.

It is a super-2 number, since 2×723242131² = 1046158360106842322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 723242096 and 723242105.

It is not a weakly prime, because it can be changed into another prime (723242111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361621065 + 361621066.

It is an arithmetic number, because the mean of its divisors is an integer number (361621066).

Almost surely, 2^723242131 is an apocalyptic number.

723242131 is a deficient number, since it is larger than the sum of its proper divisors (1).

723242131 is an equidigital number, since it uses as much as digits as its factorization.

723242131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 723242131 is about 26893.1614169848. The cubic root of 723242131 is about 897.6242407336.

Adding to 723242131 its reverse (131242327), we get a palindrome (854484458).

The spelling of 723242131 in words is "seven hundred twenty-three million, two hundred forty-two thousand, one hundred thirty-one".