90049491 has 48 divisors (see below), whose sum is σ = 153316800. Its totient is φ = 49870080.

The previous prime is 90049471. The next prime is 90049511. The reversal of 90049491 is 19494009.

It is an interprime number because it is at equal distance from previous prime (90049471) and next prime (90049511).

It is not a de Polignac number, because 90049491 - 2⁷ = 90049363 is a prime.

It is a super-3 number, since 3×90049491³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (90049411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 497421 + ... + 497601.

It is an arithmetic number, because the mean of its divisors is an integer number (3194100).

Almost surely, 2^90049491 is an apocalyptic number.

90049491 is a deficient number, since it is larger than the sum of its proper divisors (63267309).

90049491 is a wasteful number, since it uses less digits than its factorization.

90049491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 90049491 is about 9489.4410267412. The cubic root of 90049491 is about 448.2226037523. Note that the first 3 decimals are identical.

The spelling of 90049491 in words is "ninety million, forty-nine thousand, four hundred ninety-one".