724583261 has 2 divisors, whose sum is σ = 724583262. Its totient is φ = 724583260.

The previous prime is 724583227. The next prime is 724583263. The reversal of 724583261 is 162385427.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429774361 + 294808900 = 20731^2 + 17170^2 .

It is an emirp because it is prime and its reverse (162385427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 724583261 - 2²⁶ = 657474397 is a prime.

Together with 724583263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724583263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362291630 + 362291631.

It is an arithmetic number, because the mean of its divisors is an integer number (362291631).

Almost surely, 2^724583261 is an apocalyptic number.

It is an amenable number.

724583261 is a deficient number, since it is larger than the sum of its proper divisors (1).

724583261 is an equidigital number, since it uses as much as digits as its factorization.

724583261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 724583261 is about 26918.0842743313. The cubic root of 724583261 is about 898.1787288328.

The spelling of 724583261 in words is "seven hundred twenty-four million, five hundred eighty-three thousand, two hundred sixty-one".