89430661 has 2 divisors, whose sum is σ = 89430662. Its totient is φ = 89430660.

The previous prime is 89430637. The next prime is 89430703. The reversal of 89430661 is 16603498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79388100 + 10042561 = 8910^2 + 3169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89430661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89430661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89430611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44715330 + 44715331.

It is an arithmetic number, because the mean of its divisors is an integer number (44715331).

Almost surely, 2^89430661 is an apocalyptic number.

It is an amenable number.

89430661 is a deficient number, since it is larger than the sum of its proper divisors (1).

89430661 is an equidigital number, since it uses as much as digits as its factorization.

89430661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 89430661 is about 9456.7785741234. The cubic root of 89430661 is about 447.1934977635.

The spelling of 89430661 in words is "eighty-nine million, four hundred thirty thousand, six hundred sixty-one".