76321261 has 2 divisors, whose sum is σ = 76321262. Its totient is φ = 76321260.

The previous prime is 76321253. The next prime is 76321283. The reversal of 76321261 is 16212367.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48916036 + 27405225 = 6994^2 + 5235^2 .

It is a cyclic number.

It is not a de Polignac number, because 76321261 - 2³ = 76321253 is a prime.

It is a super-3 number, since 3×76321261³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76322261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38160630 + 38160631.

It is an arithmetic number, because the mean of its divisors is an integer number (38160631).

Almost surely, 2^76321261 is an apocalyptic number.

It is an amenable number.

76321261 is a deficient number, since it is larger than the sum of its proper divisors (1).

76321261 is an equidigital number, since it uses as much as digits as its factorization.

76321261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 76321261 is about 8736.2040383682. The cubic root of 76321261 is about 424.1783636811.

The spelling of 76321261 in words is "seventy-six million, three hundred twenty-one thousand, two hundred sixty-one".