90189455 has 8 divisors (see below), whose sum is σ = 109006800. Its totient is φ = 71631936.

The previous prime is 90189443. The next prime is 90189457. The reversal of 90189455 is 55498109.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90189455 - 2¹⁰ = 90188431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90189457) 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 7 ways as a sum of consecutive naturals, for example, 64190 + ... + 65579.

It is an arithmetic number, because the mean of its divisors is an integer number (13625850).

Almost surely, 2^90189455 is an apocalyptic number.

90189455 is a deficient number, since it is larger than the sum of its proper divisors (18817345).

90189455 is a wasteful number, since it uses less digits than its factorization.

90189455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129913.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 90189455 is about 9496.8128864372. The cubic root of 90189455 is about 448.4547077980.

The spelling of 90189455 in words is "ninety million, one hundred eighty-nine thousand, four hundred fifty-five".