89861729 has 2 divisors, whose sum is σ = 89861730. Its totient is φ = 89861728.

The previous prime is 89861699. The next prime is 89861741. The reversal of 89861729 is 92716898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56776225 + 33085504 = 7535^2 + 5752^2 .

It is a cyclic number.

It is not a de Polignac number, because 89861729 - 2¹² = 89857633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89861929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44930864 + 44930865.

It is an arithmetic number, because the mean of its divisors is an integer number (44930865).

Almost surely, 2^89861729 is an apocalyptic number.

It is an amenable number.

89861729 is a deficient number, since it is larger than the sum of its proper divisors (1).

89861729 is an equidigital number, since it uses as much as digits as its factorization.

89861729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 89861729 is about 9479.5426577446. The cubic root of 89861729 is about 447.9108576491.

The spelling of 89861729 in words is "eighty-nine million, eight hundred sixty-one thousand, seven hundred twenty-nine".