89678205404477 has 2 divisors, whose sum is σ = 89678205404478. Its totient is φ = 89678205404476.

The previous prime is 89678205404461. The next prime is 89678205404497. The reversal of 89678205404477 is 77440450287698.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81157288282756 + 8520917121721 = 9008734^2 + 2919061^2 .

It is a cyclic number.

It is not a de Polignac number, because 89678205404477 - 2⁴ = 89678205404461 is a prime.

It is a super-2 number, since 2×89678205404477² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 89678205404477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89678205404407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44839102702238 + 44839102702239.

It is an arithmetic number, because the mean of its divisors is an integer number (44839102702239).

Almost surely, 2^{89678205404477} is an apocalyptic number.

It is an amenable number.

89678205404477 is a deficient number, since it is larger than the sum of its proper divisors (1).

89678205404477 is an equidigital number, since it uses as much as digits as its factorization.

89678205404477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 758661120, while the sum is 71.

The spelling of 89678205404477 in words is "eighty-nine trillion, six hundred seventy-eight billion, two hundred five million, four hundred four thousand, four hundred seventy-seven".