275123621 has 2 divisors, whose sum is σ = 275123622. Its totient is φ = 275123620.

The previous prime is 275123617. The next prime is 275123647. The reversal of 275123621 is 126321572.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169260100 + 105863521 = 13010^2 + 10289^2 .

It is a cyclic number.

It is not a de Polignac number, because 275123621 - 2² = 275123617 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275122621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137561810 + 137561811.

It is an arithmetic number, because the mean of its divisors is an integer number (137561811).

Almost surely, 2^275123621 is an apocalyptic number.

It is an amenable number.

275123621 is a deficient number, since it is larger than the sum of its proper divisors (1).

275123621 is an equidigital number, since it uses as much as digits as its factorization.

275123621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 275123621 is about 16586.8508463783. The cubic root of 275123621 is about 650.3931515041.

The spelling of 275123621 in words is "two hundred seventy-five million, one hundred twenty-three thousand, six hundred twenty-one".