721411850749 has 2 divisors, whose sum is σ = 721411850750. Its totient is φ = 721411850748.

The previous prime is 721411850699. The next prime is 721411850759. The reversal of 721411850749 is 947058114127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658702676025 + 62709174724 = 811605^2 + 250418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721411850749 is a prime.

It is a super-2 number, since 2×721411850749² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721411850759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360705925374 + 360705925375.

It is an arithmetic number, because the mean of its divisors is an integer number (360705925375).

Almost surely, 2^721411850749 is an apocalyptic number.

It is an amenable number.

721411850749 is a deficient number, since it is larger than the sum of its proper divisors (1).

721411850749 is an equidigital number, since it uses as much as digits as its factorization.

721411850749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 721411850749 in words is "seven hundred twenty-one billion, four hundred eleven million, eight hundred fifty thousand, seven hundred forty-nine".