89521477 has 2 divisors, whose sum is σ = 89521478. Its totient is φ = 89521476.

The previous prime is 89521469. The next prime is 89521499. The reversal of 89521477 is 77412598.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73513476 + 16008001 = 8574^2 + 4001^2 .

It is a cyclic number.

It is not a de Polignac number, because 89521477 - 2³ = 89521469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89521427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44760738 + 44760739.

It is an arithmetic number, because the mean of its divisors is an integer number (44760739).

Almost surely, 2^89521477 is an apocalyptic number.

It is an amenable number.

89521477 is a deficient number, since it is larger than the sum of its proper divisors (1).

89521477 is an equidigital number, since it uses as much as digits as its factorization.

89521477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 89521477 is about 9461.5789908450. The cubic root of 89521477 is about 447.3448201580.

It can be divided in two parts, 89521 and 477, that added together give a palindrome (89998).

The spelling of 89521477 in words is "eighty-nine million, five hundred twenty-one thousand, four hundred seventy-seven".