55449397 has 2 divisors, whose sum is σ = 55449398. Its totient is φ = 55449396.

The previous prime is 55449377. The next prime is 55449431. The reversal of 55449397 is 79394455.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49646116 + 5803281 = 7046^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 55449397 - 2¹⁹ = 54925109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55449337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27724698 + 27724699.

It is an arithmetic number, because the mean of its divisors is an integer number (27724699).

Almost surely, 2^55449397 is an apocalyptic number.

It is an amenable number.

55449397 is a deficient number, since it is larger than the sum of its proper divisors (1).

55449397 is an equidigital number, since it uses as much as digits as its factorization.

55449397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 46.

The square root of 55449397 is about 7446.4351873900. The cubic root of 55449397 is about 381.3282167927.

It can be divided in two parts, 5544 and 9397, that added together give a palindrome (14941).

The spelling of 55449397 in words is "fifty-five million, four hundred forty-nine thousand, three hundred ninety-seven".