90055649 has 8 divisors (see below), whose sum is σ = 98917440. Its totient is φ = 81606096.

The previous prime is 90055633. The next prime is 90055657. The reversal of 90055649 is 94655009.

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 90055649 - 2⁴ = 90055633 is a prime.

It is a super-2 number, since 2×90055649² = 16220039833622402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90055699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102602 + ... + 103475.

It is an arithmetic number, because the mean of its divisors is an integer number (12364680).

Almost surely, 2^90055649 is an apocalyptic number.

It is an amenable number.

90055649 is a deficient number, since it is larger than the sum of its proper divisors (8861791).

90055649 is a wasteful number, since it uses less digits than its factorization.

90055649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206119.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 90055649 is about 9489.7654870919. The cubic root of 90055649 is about 448.2328206965.

The spelling of 90055649 in words is "ninety million, fifty-five thousand, six hundred forty-nine".