726531137 has 2 divisors, whose sum is σ = 726531138. Its totient is φ = 726531136.

The previous prime is 726531131. The next prime is 726531151. The reversal of 726531137 is 731135627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591413761 + 135117376 = 24319^2 + 11624^2 .

It is a cyclic number.

It is not a de Polignac number, because 726531137 - 2¹⁶ = 726465601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 726531097 and 726531106.

It is not a weakly prime, because it can be changed into another prime (726531131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363265568 + 363265569.

It is an arithmetic number, because the mean of its divisors is an integer number (363265569).

Almost surely, 2^726531137 is an apocalyptic number.

It is an amenable number.

726531137 is a deficient number, since it is larger than the sum of its proper divisors (1).

726531137 is an equidigital number, since it uses as much as digits as its factorization.

726531137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 35.

The square root of 726531137 is about 26954.2415400619. The cubic root of 726531137 is about 898.9828578978.

The spelling of 726531137 in words is "seven hundred twenty-six million, five hundred thirty-one thousand, one hundred thirty-seven".