54891493 has 2 divisors, whose sum is σ = 54891494. Its totient is φ = 54891492.

The previous prime is 54891479. The next prime is 54891509. The reversal of 54891493 is 39419845.

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., 48972004 + 5919489 = 6998^2 + 2433^2 .

It is a cyclic number.

It is not a de Polignac number, because 54891493 - 2²⁵ = 21337061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54891413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27445746 + 27445747.

It is an arithmetic number, because the mean of its divisors is an integer number (27445747).

Almost surely, 2^54891493 is an apocalyptic number.

It is an amenable number.

54891493 is a deficient number, since it is larger than the sum of its proper divisors (1).

54891493 is an equidigital number, since it uses as much as digits as its factorization.

54891493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 54891493 is about 7408.8793349602. The cubic root of 54891493 is about 380.0449923642.

The spelling of 54891493 in words is "fifty-four million, eight hundred ninety-one thousand, four hundred ninety-three".