55140493 has 2 divisors, whose sum is σ = 55140494. Its totient is φ = 55140492.

The previous prime is 55140473. The next prime is 55140539. The reversal of 55140493 is 39404155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53978409 + 1162084 = 7347^2 + 1078^2 .

It is a cyclic number.

It is not a de Polignac number, because 55140493 - 2⁵ = 55140461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55140403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27570246 + 27570247.

It is an arithmetic number, because the mean of its divisors is an integer number (27570247).

Almost surely, 2^55140493 is an apocalyptic number.

It is an amenable number.

55140493 is a deficient number, since it is larger than the sum of its proper divisors (1).

55140493 is an equidigital number, since it uses as much as digits as its factorization.

55140493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 55140493 is about 7425.6644820514. The cubic root of 55140493 is about 380.6187817808.

The spelling of 55140493 in words is "fifty-five million, one hundred forty thousand, four hundred ninety-three".