655469091 has 20 divisors (see below), whose sum is σ = 1003044504. Its totient is φ = 426319200.

The previous prime is 655469071. The next prime is 655469131. The reversal of 655469091 is 190964556.

It is a happy number.

655469091 is a `hidden beast` number, since 6 + 554 + 6 + 9 + 0 + 91 = 666.

It is not a de Polignac number, because 655469091 - 2²⁵ = 621914659 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (655469041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 95365 + ... + 102006.

Almost surely, 2^655469091 is an apocalyptic number.

655469091 is a deficient number, since it is larger than the sum of its proper divisors (347575413).

655469091 is a wasteful number, since it uses less digits than its factorization.

655469091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197424 (or 197415 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 655469091 is about 25602.1305949329. The cubic root of 655469091 is about 868.6618310121.

The spelling of 655469091 in words is "six hundred fifty-five million, four hundred sixty-nine thousand, ninety-one".