523442137 has 2 divisors, whose sum is σ = 523442138. Its totient is φ = 523442136.

The previous prime is 523442093. The next prime is 523442233. The reversal of 523442137 is 731244325.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397643481 + 125798656 = 19941^2 + 11216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523442137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 523442099 and 523442108.

It is not a weakly prime, because it can be changed into another prime (523446137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261721068 + 261721069.

It is an arithmetic number, because the mean of its divisors is an integer number (261721069).

Almost surely, 2^523442137 is an apocalyptic number.

It is an amenable number.

523442137 is a deficient number, since it is larger than the sum of its proper divisors (1).

523442137 is an equidigital number, since it uses as much as digits as its factorization.

523442137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 31.

The square root of 523442137 is about 22878.8578604790. The cubic root of 523442137 is about 805.9155956949.

The spelling of 523442137 in words is "five hundred twenty-three million, four hundred forty-two thousand, one hundred thirty-seven".