725552237 has 2 divisors, whose sum is σ = 725552238. Its totient is φ = 725552236.

The previous prime is 725552213. The next prime is 725552249. The reversal of 725552237 is 732255527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609645481 + 115906756 = 24691^2 + 10766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725552237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 725552237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725551237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362776118 + 362776119.

It is an arithmetic number, because the mean of its divisors is an integer number (362776119).

Almost surely, 2^725552237 is an apocalyptic number.

It is an amenable number.

725552237 is a deficient number, since it is larger than the sum of its proper divisors (1).

725552237 is an equidigital number, since it uses as much as digits as its factorization.

725552237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147000, while the sum is 38.

The square root of 725552237 is about 26936.0768672797. The cubic root of 725552237 is about 898.5789248322.

The spelling of 725552237 in words is "seven hundred twenty-five million, five hundred fifty-two thousand, two hundred thirty-seven".