514903661 has 2 divisors, whose sum is σ = 514903662. Its totient is φ = 514903660.

The previous prime is 514903651. The next prime is 514903663. The reversal of 514903661 is 166309415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513883561 + 1020100 = 22669^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 514903661 - 2²² = 510709357 is a prime.

It is a super-2 number, since 2×514903661² = 530251560222405842, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 514903663, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_27098351 and since 514903661 and 27098351 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (514903663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257451830 + 257451831.

It is an arithmetic number, because the mean of its divisors is an integer number (257451831).

Almost surely, 2^514903661 is an apocalyptic number.

It is an amenable number.

514903661 is a deficient number, since it is larger than the sum of its proper divisors (1).

514903661 is an equidigital number, since it uses as much as digits as its factorization.

514903661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 514903661 is about 22691.4887347657. The cubic root of 514903661 is about 801.5094735083.

The spelling of 514903661 in words is "five hundred fourteen million, nine hundred three thousand, six hundred sixty-one".