725955689 has 2 divisors, whose sum is σ = 725955690. Its totient is φ = 725955688.

The previous prime is 725955683. The next prime is 725955697. The reversal of 725955689 is 986559527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 516198400 + 209757289 = 22720^2 + 14483^2 .

It is a cyclic number.

It is not a de Polignac number, because 725955689 - 2²⁸ = 457520233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (725955683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362977844 + 362977845.

It is an arithmetic number, because the mean of its divisors is an integer number (362977845).

Almost surely, 2^725955689 is an apocalyptic number.

It is an amenable number.

725955689 is a deficient number, since it is larger than the sum of its proper divisors (1).

725955689 is an equidigital number, since it uses as much as digits as its factorization.

725955689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804000, while the sum is 56.

The square root of 725955689 is about 26943.5648903407. The cubic root of 725955689 is about 898.7454491566.

The spelling of 725955689 in words is "seven hundred twenty-five million, nine hundred fifty-five thousand, six hundred eighty-nine".