83787481 has 2 divisors, whose sum is σ = 83787482. Its totient is φ = 83787480.

The previous prime is 83787463. The next prime is 83787547. The reversal of 83787481 is 18478738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78925456 + 4862025 = 8884^2 + 2205^2 .

It is a cyclic number.

It is not a de Polignac number, because 83787481 - 2¹¹ = 83785433 is a prime.

It is a super-2 number, since 2×83787481² = 14040683944650722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83787281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41893740 + 41893741.

It is an arithmetic number, because the mean of its divisors is an integer number (41893741).

Almost surely, 2^83787481 is an apocalyptic number.

It is an amenable number.

83787481 is a deficient number, since it is larger than the sum of its proper divisors (1).

83787481 is an equidigital number, since it uses as much as digits as its factorization.

83787481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 301056, while the sum is 46.

The square root of 83787481 is about 9153.5501855837. The cubic root of 83787481 is about 437.5822643674.

The spelling of 83787481 in words is "eighty-three million, seven hundred eighty-seven thousand, four hundred eighty-one".