654780091 has 6 divisors (see below), whose sum is σ = 761683020. Its totient is φ = 561240036.

The previous prime is 654780089. The next prime is 654780103. The reversal of 654780091 is 190087456.

It is not a de Polignac number, because 654780091 - 2¹ = 654780089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654780001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6681381 + ... + 6681478.

It is an arithmetic number, because the mean of its divisors is an integer number (126947170).

Almost surely, 2^654780091 is an apocalyptic number.

654780091 is a deficient number, since it is larger than the sum of its proper divisors (106902929).

654780091 is a wasteful number, since it uses less digits than its factorization.

654780091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13362873 (or 13362866 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 654780091 is about 25588.6711456457. The cubic root of 654780091 is about 868.3573580574.

The spelling of 654780091 in words is "six hundred fifty-four million, seven hundred eighty thousand, ninety-one".