726741761 has 2 divisors, whose sum is σ = 726741762. Its totient is φ = 726741760.

The previous prime is 726741737. The next prime is 726741767. The reversal of 726741761 is 167147627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 721191025 + 5550736 = 26855^2 + 2356^2 .

It is a cyclic number.

It is not a de Polignac number, because 726741761 - 2²² = 722547457 is a prime.

It is a super-2 number, since 2×726741761² = 1056307174362762242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (726741767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363370880 + 363370881.

It is an arithmetic number, because the mean of its divisors is an integer number (363370881).

Almost surely, 2^726741761 is an apocalyptic number.

It is an amenable number.

726741761 is a deficient number, since it is larger than the sum of its proper divisors (1).

726741761 is an equidigital number, since it uses as much as digits as its factorization.

726741761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 41.

The square root of 726741761 is about 26958.1483229097. The cubic root of 726741761 is about 899.0697222964.

The spelling of 726741761 in words is "seven hundred twenty-six million, seven hundred forty-one thousand, seven hundred sixty-one".