731057 has 2 divisors, whose sum is σ = 731058. Its totient is φ = 731056.

The previous prime is 731053. The next prime is 731113. The reversal of 731057 is 750137.

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., 602176 + 128881 = 776^2 + 359^2 .

It is an emirp because it is prime and its reverse (750137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 731057 - 2² = 731053 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (731053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365528 + 365529.

It is an arithmetic number, because the mean of its divisors is an integer number (365529).

2⁷³¹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

731057 is a deficient number, since it is larger than the sum of its proper divisors (1).

731057 is an equidigital number, since it uses as much as digits as its factorization.

731057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 735, while the sum is 23.

The square root of 731057 is about 855.0187132455. The cubic root of 731057 is about 90.0845707119.

The spelling of 731057 in words is "seven hundred thirty-one thousand, fifty-seven".