723161137 has 2 divisors, whose sum is σ = 723161138. Its totient is φ = 723161136.

The previous prime is 723161119. The next prime is 723161167. The reversal of 723161137 is 731161327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597362481 + 125798656 = 24441^2 + 11216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-723161137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 723161099 and 723161108.

It is not a weakly prime, because it can be changed into another prime (723161167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361580568 + 361580569.

It is an arithmetic number, because the mean of its divisors is an integer number (361580569).

Almost surely, 2^723161137 is an apocalyptic number.

It is an amenable number.

723161137 is a deficient number, since it is larger than the sum of its proper divisors (1).

723161137 is an equidigital number, since it uses as much as digits as its factorization.

723161137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 31.

The square root of 723161137 is about 26891.6555273193. The cubic root of 723161137 is about 897.5907319502.

The spelling of 723161137 in words is "seven hundred twenty-three million, one hundred sixty-one thousand, one hundred thirty-seven".