981477487 has 2 divisors, whose sum is σ = 981477488. Its totient is φ = 981477486.

The previous prime is 981477457. The next prime is 981477491. The reversal of 981477487 is 784774189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 981477487 - 2¹⁵ = 981444719 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 (981477437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490738743 + 490738744.

It is an arithmetic number, because the mean of its divisors is an integer number (490738744).

Almost surely, 2^981477487 is an apocalyptic number.

981477487 is a deficient number, since it is larger than the sum of its proper divisors (1).

981477487 is an equidigital number, since it uses as much as digits as its factorization.

981477487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 55.

The square root of 981477487 is about 31328.5410927480. The cubic root of 981477487 is about 993.7873114322.

The spelling of 981477487 in words is "nine hundred eighty-one million, four hundred seventy-seven thousand, four hundred eighty-seven".