54781487 has 2 divisors, whose sum is σ = 54781488. Its totient is φ = 54781486.

The previous prime is 54781481. The next prime is 54781499. The reversal of 54781487 is 78418745.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54781487 - 2⁴ = 54781471 is a prime.

It is a super-2 number, since 2×54781487² = 6002022635862338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54781481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27390743 + 27390744.

It is an arithmetic number, because the mean of its divisors is an integer number (27390744).

Almost surely, 2^54781487 is an apocalyptic number.

54781487 is a deficient number, since it is larger than the sum of its proper divisors (1).

54781487 is an equidigital number, since it uses as much as digits as its factorization.

54781487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250880, while the sum is 44.

The square root of 54781487 is about 7401.4516819338. The cubic root of 54781487 is about 379.7909445669.

The spelling of 54781487 in words is "fifty-four million, seven hundred eighty-one thousand, four hundred eighty-seven".