89431285261 has 4 divisors (see below), whose sum is σ = 90353257372. Its totient is φ = 88509313152.

The previous prime is 89431285259. The next prime is 89431285289. The reversal of 89431285261 is 16258213498.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37488317161 + 51942968100 = 193619^2 + 227910^2 .

It is a cyclic number.

It is not a de Polignac number, because 89431285261 - 2¹ = 89431285259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89431285561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460985910 + ... + 460986103.

It is an arithmetic number, because the mean of its divisors is an integer number (22588314343).

Almost surely, 2^89431285261 is an apocalyptic number.

It is an amenable number.

89431285261 is a deficient number, since it is larger than the sum of its proper divisors (921972111).

89431285261 is an equidigital number, since it uses as much as digits as its factorization.

89431285261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921972110.

The product of its digits is 829440, while the sum is 49.

The spelling of 89431285261 in words is "eighty-nine billion, four hundred thirty-one million, two hundred eighty-five thousand, two hundred sixty-one".