89763781 has 2 divisors, whose sum is σ = 89763782. Its totient is φ = 89763780.

The previous prime is 89763769. The next prime is 89763797. The reversal of 89763781 is 18736798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88830625 + 933156 = 9425^2 + 966^2 .

It is a cyclic number.

It is not a de Polignac number, because 89763781 - 2¹¹ = 89761733 is a prime.

It is a super-2 number, since 2×89763781² = 16115072758831922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89763701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44881890 + 44881891.

It is an arithmetic number, because the mean of its divisors is an integer number (44881891).

Almost surely, 2^89763781 is an apocalyptic number.

It is an amenable number.

89763781 is a deficient number, since it is larger than the sum of its proper divisors (1).

89763781 is an equidigital number, since it uses as much as digits as its factorization.

89763781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 89763781 is about 9474.3749661917. The cubic root of 89763781 is about 447.7480596750.

The spelling of 89763781 in words is "eighty-nine million, seven hundred sixty-three thousand, seven hundred eighty-one".