726121751 has 2 divisors, whose sum is σ = 726121752. Its totient is φ = 726121750.

The previous prime is 726121723. The next prime is 726121769. The reversal of 726121751 is 157121627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 726121751 - 2⁶ = 726121687 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726121771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363060875 + 363060876.

It is an arithmetic number, because the mean of its divisors is an integer number (363060876).

Almost surely, 2^726121751 is an apocalyptic number.

726121751 is a deficient number, since it is larger than the sum of its proper divisors (1).

726121751 is an equidigital number, since it uses as much as digits as its factorization.

726121751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5880, while the sum is 32.

The square root of 726121751 is about 26946.6463776107. The cubic root of 726121751 is about 898.8139731222.

The spelling of 726121751 in words is "seven hundred twenty-six million, one hundred twenty-one thousand, seven hundred fifty-one".