89477009 has 2 divisors, whose sum is σ = 89477010. Its totient is φ = 89477008.

The previous prime is 89476999. The next prime is 89477021. The reversal of 89477009 is 90077498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87142225 + 2334784 = 9335^2 + 1528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89477009 is a prime.

It is a super-2 number, since 2×89477009² = 16012270279172162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89473009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44738504 + 44738505.

It is an arithmetic number, because the mean of its divisors is an integer number (44738505).

Almost surely, 2^89477009 is an apocalyptic number.

It is an amenable number.

89477009 is a deficient number, since it is larger than the sum of its proper divisors (1).

89477009 is an equidigital number, since it uses as much as digits as its factorization.

89477009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 89477009 is about 9459.2287740598. The cubic root of 89477009 is about 447.2707380316.

The spelling of 89477009 in words is "eighty-nine million, four hundred seventy-seven thousand, nine".