55280969 has 2 divisors, whose sum is σ = 55280970. Its totient is φ = 55280968.

The previous prime is 55280947. The next prime is 55280987. The reversal of 55280969 is 96908255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36445369 + 18835600 = 6037^2 + 4340^2 .

It is a cyclic number.

It is not a de Polignac number, because 55280969 - 2⁸ = 55280713 is a prime.

It is a super-2 number, since 2×55280969² = 6111971067157922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55280999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640484 + 27640485.

It is an arithmetic number, because the mean of its divisors is an integer number (27640485).

Almost surely, 2^55280969 is an apocalyptic number.

It is an amenable number.

55280969 is a deficient number, since it is larger than the sum of its proper divisors (1).

55280969 is an equidigital number, since it uses as much as digits as its factorization.

55280969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 55280969 is about 7435.1172821954. The cubic root of 55280969 is about 380.9417293423.

The spelling of 55280969 in words is "fifty-five million, two hundred eighty thousand, nine hundred sixty-nine".