55173997 has 2 divisors, whose sum is σ = 55173998. Its totient is φ = 55173996.

The previous prime is 55173983. The next prime is 55174013. The reversal of 55173997 is 79937155.

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., 38576521 + 16597476 = 6211^2 + 4074^2 .

It is a cyclic number.

It is not a de Polignac number, because 55173997 - 2¹⁹ = 54649709 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 (55173917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27586998 + 27586999.

It is an arithmetic number, because the mean of its divisors is an integer number (27586999).

Almost surely, 2^55173997 is an apocalyptic number.

It is an amenable number.

55173997 is a deficient number, since it is larger than the sum of its proper divisors (1).

55173997 is an equidigital number, since it uses as much as digits as its factorization.

55173997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 297675, while the sum is 46.

The square root of 55173997 is about 7427.9200991933. The cubic root of 55173997 is about 380.6958556276.

The spelling of 55173997 in words is "fifty-five million, one hundred seventy-three thousand, nine hundred ninety-seven".