724037641 has 2 divisors, whose sum is σ = 724037642. Its totient is φ = 724037640.

The previous prime is 724037621. The next prime is 724037647. The reversal of 724037641 is 146730427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536895241 + 187142400 = 23171^2 + 13680^2 .

It is an emirp because it is prime and its reverse (146730427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 724037641 - 2⁷ = 724037513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 724037597 and 724037606.

It is not a weakly prime, because it can be changed into another prime (724037647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362018820 + 362018821.

It is an arithmetic number, because the mean of its divisors is an integer number (362018821).

Almost surely, 2^724037641 is an apocalyptic number.

It is an amenable number.

724037641 is a deficient number, since it is larger than the sum of its proper divisors (1).

724037641 is an equidigital number, since it uses as much as digits as its factorization.

724037641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 724037641 is about 26907.9475434304. The cubic root of 724037641 is about 897.9532257223.

The spelling of 724037641 in words is "seven hundred twenty-four million, thirty-seven thousand, six hundred forty-one".