55724897 has 2 divisors, whose sum is σ = 55724898. Its totient is φ = 55724896.

The previous prime is 55724873. The next prime is 55724899. The reversal of 55724897 is 79842755.

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., 46730896 + 8994001 = 6836^2 + 2999^2 .

It is a cyclic number.

It is not a de Polignac number, because 55724897 - 2¹⁰ = 55723873 is a prime.

Together with 55724899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55724899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27862448 + 27862449.

It is an arithmetic number, because the mean of its divisors is an integer number (27862449).

Almost surely, 2^55724897 is an apocalyptic number.

It is an amenable number.

55724897 is a deficient number, since it is larger than the sum of its proper divisors (1).

55724897 is an equidigital number, since it uses as much as digits as its factorization.

55724897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 47.

The square root of 55724897 is about 7464.9110510441. The cubic root of 55724897 is about 381.9587160597.

The spelling of 55724897 in words is "fifty-five million, seven hundred twenty-four thousand, eight hundred ninety-seven".