731261761 has 2 divisors, whose sum is σ = 731261762. Its totient is φ = 731261760.

The previous prime is 731261611. The next prime is 731261777. The reversal of 731261761 is 167162137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549011761 + 182250000 = 23431^2 + 13500^2 .

It is a cyclic number.

It is not a de Polignac number, because 731261761 - 2¹³ = 731253569 is a prime.

It is a super-2 number, since 2×731261761² = 1069487526201642242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (731261561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365630880 + 365630881.

It is an arithmetic number, because the mean of its divisors is an integer number (365630881).

Almost surely, 2^731261761 is an apocalyptic number.

It is an amenable number.

731261761 is a deficient number, since it is larger than the sum of its proper divisors (1).

731261761 is an equidigital number, since it uses as much as digits as its factorization.

731261761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 731261761 is about 27041.8520260725. The cubic root of 731261761 is about 900.9298049159.

The spelling of 731261761 in words is "seven hundred thirty-one million, two hundred sixty-one thousand, seven hundred sixty-one".