276990257 has 2 divisors, whose sum is σ = 276990258. Its totient is φ = 276990256.

The previous prime is 276990229. The next prime is 276990269. The reversal of 276990257 is 752099672.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149842081 + 127148176 = 12241^2 + 11276^2 .

It is a cyclic number.

It is not a de Polignac number, because 276990257 - 2⁸ = 276990001 is a prime.

It is not a weakly prime, because it can be changed into another prime (276990157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138495128 + 138495129.

It is an arithmetic number, because the mean of its divisors is an integer number (138495129).

Almost surely, 2^276990257 is an apocalyptic number.

It is an amenable number.

276990257 is a deficient number, since it is larger than the sum of its proper divisors (1).

276990257 is an equidigital number, since it uses as much as digits as its factorization.

276990257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 276990257 is about 16643.0242744520. The cubic root of 276990257 is about 651.8607486435.

The spelling of 276990257 in words is "two hundred seventy-six million, nine hundred ninety thousand, two hundred fifty-seven".