87545477 has 2 divisors, whose sum is σ = 87545478. Its totient is φ = 87545476.

The previous prime is 87545459. The next prime is 87545489. The reversal of 87545477 is 77454578.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82283041 + 5262436 = 9071^2 + 2294^2 .

It is a cyclic number.

It is not a de Polignac number, because 87545477 - 2¹⁰ = 87544453 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 (87545417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43772738 + 43772739.

It is an arithmetic number, because the mean of its divisors is an integer number (43772739).

Almost surely, 2^87545477 is an apocalyptic number.

It is an amenable number.

87545477 is a deficient number, since it is larger than the sum of its proper divisors (1).

87545477 is an equidigital number, since it uses as much as digits as its factorization.

87545477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1097600, while the sum is 47.

The square root of 87545477 is about 9356.5739990661. The cubic root of 87545477 is about 444.0289003318.

The spelling of 87545477 in words is "eighty-seven million, five hundred forty-five thousand, four hundred seventy-seven".