55457387 has 2 divisors, whose sum is σ = 55457388. Its totient is φ = 55457386.

The previous prime is 55457377. The next prime is 55457429. The reversal of 55457387 is 78375455.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55457387 - 2⁶ = 55457323 is a prime.

It is not a weakly prime, because it can be changed into another prime (55457377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27728693 + 27728694.

It is an arithmetic number, because the mean of its divisors is an integer number (27728694).

Almost surely, 2^55457387 is an apocalyptic number.

55457387 is a deficient number, since it is larger than the sum of its proper divisors (1).

55457387 is an equidigital number, since it uses as much as digits as its factorization.

55457387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588000, while the sum is 44.

The square root of 55457387 is about 7446.9716663890. The cubic root of 55457387 is about 381.3465317867.

The spelling of 55457387 in words is "fifty-five million, four hundred fifty-seven thousand, three hundred eighty-seven".