89740387481 has 2 divisors, whose sum is σ = 89740387482. Its totient is φ = 89740387480.

The previous prime is 89740387469. The next prime is 89740387483. The reversal of 89740387481 is 18478304798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62429519881 + 27310867600 = 249859^2 + 165260^2 .

It is a cyclic number.

It is not a de Polignac number, because 89740387481 - 2¹⁰ = 89740386457 is a prime.

It is a super-2 number, since 2×89740387481² (a number of 23 digits) contains 22 as substring.

Together with 89740387483, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89740387481.

It is not a weakly prime, because it can be changed into another prime (89740387483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44870193740 + 44870193741.

It is an arithmetic number, because the mean of its divisors is an integer number (44870193741).

Almost surely, 2^89740387481 is an apocalyptic number.

It is an amenable number.

89740387481 is a deficient number, since it is larger than the sum of its proper divisors (1).

89740387481 is an equidigital number, since it uses as much as digits as its factorization.

89740387481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10838016, while the sum is 59.

The spelling of 89740387481 in words is "eighty-nine billion, seven hundred forty million, three hundred eighty-seven thousand, four hundred eighty-one".