89661511 has 2 divisors, whose sum is σ = 89661512. Its totient is φ = 89661510.

The previous prime is 89661503. The next prime is 89661527. The reversal of 89661511 is 11516698.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89661511 - 2³ = 89661503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89661581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44830755 + 44830756.

It is an arithmetic number, because the mean of its divisors is an integer number (44830756).

Almost surely, 2^89661511 is an apocalyptic number.

89661511 is a deficient number, since it is larger than the sum of its proper divisors (1).

89661511 is an equidigital number, since it uses as much as digits as its factorization.

89661511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 37.

The square root of 89661511 is about 9468.9762382213. The cubic root of 89661511 is about 447.5779517358.

The spelling of 89661511 in words is "eighty-nine million, six hundred sixty-one thousand, five hundred eleven".