55438373 has 2 divisors, whose sum is σ = 55438374. Its totient is φ = 55438372.

The previous prime is 55438363. The next prime is 55438379. The reversal of 55438373 is 37383455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49098049 + 6340324 = 7007^2 + 2518^2 .

It is a cyclic number.

It is not a de Polignac number, because 55438373 - 2¹² = 55434277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55438379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27719186 + 27719187.

It is an arithmetic number, because the mean of its divisors is an integer number (27719187).

Almost surely, 2^55438373 is an apocalyptic number.

It is an amenable number.

55438373 is a deficient number, since it is larger than the sum of its proper divisors (1).

55438373 is an equidigital number, since it uses as much as digits as its factorization.

55438373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 38.

The square root of 55438373 is about 7445.6949306294. The cubic root of 55438373 is about 381.3029442553.

The spelling of 55438373 in words is "fifty-five million, four hundred thirty-eight thousand, three hundred seventy-three".