275929649 has 2 divisors, whose sum is σ = 275929650. Its totient is φ = 275929648.

The previous prime is 275929627. The next prime is 275929663. The reversal of 275929649 is 946929572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222010000 + 53919649 = 14900^2 + 7343^2 .

It is a cyclic number.

It is not a de Polignac number, because 275929649 - 2¹² = 275925553 is a prime.

It is a super-2 number, since 2×275929649² = 152274342394526402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 275929649.

It is not a weakly prime, because it can be changed into another prime (275920649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137964824 + 137964825.

It is an arithmetic number, because the mean of its divisors is an integer number (137964825).

Almost surely, 2^275929649 is an apocalyptic number.

It is an amenable number.

275929649 is a deficient number, since it is larger than the sum of its proper divisors (1).

275929649 is an equidigital number, since it uses as much as digits as its factorization.

275929649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 275929649 is about 16611.1302746080. The cubic root of 275929649 is about 651.0276831998.

The spelling of 275929649 in words is "two hundred seventy-five million, nine hundred twenty-nine thousand, six hundred forty-nine".