42093497889 has 9 divisors (see below), whose sum is σ = 60802608243. Its totient is φ = 28061921592.

The previous prime is 42093497881. The next prime is 42093497917. The reversal of 42093497889 is 98879439024.

The square root of 42093497889 is 205167.

It is a perfect power (a square), and thus also a powerful number.

42093497889 is a `hidden beast` number, since 4 + 209 + 349 + 7 + 8 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 34218710289 + 7874787600 = 184983^2 + 88740^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 42093497889 - 2³ = 42093497881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42093497881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 581307 + ... + 649695.

Almost surely, 2^42093497889 is an apocalyptic number.

42093497889 is the 205167-th square number.

42093497889 is the 102584-th centered octagonal number.

It is an amenable number.

42093497889 is a deficient number, since it is larger than the sum of its proper divisors (18709110354).

42093497889 is an frugal number, since it uses more digits than its factorization.

42093497889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136784 (or 68392 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 42093497889 in words is "forty-two billion, ninety-three million, four hundred ninety-seven thousand, eight hundred eighty-nine".