55869197 has 2 divisors, whose sum is σ = 55869198. Its totient is φ = 55869196.

The previous prime is 55869193. The next prime is 55869199. The reversal of 55869197 is 79196855.

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., 52722121 + 3147076 = 7261^2 + 1774^2 .

It is a cyclic number.

It is not a de Polignac number, because 55869197 - 2² = 55869193 is a prime.

Together with 55869199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55869193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27934598 + 27934599.

It is an arithmetic number, because the mean of its divisors is an integer number (27934599).

Almost surely, 2^55869197 is an apocalyptic number.

It is an amenable number.

55869197 is a deficient number, since it is larger than the sum of its proper divisors (1).

55869197 is an equidigital number, since it uses as much as digits as its factorization.

55869197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 50.

The square root of 55869197 is about 7474.5700210781. The cubic root of 55869197 is about 382.2881267841.

The spelling of 55869197 in words is "fifty-five million, eight hundred sixty-nine thousand, one hundred ninety-seven".