90199505 has 8 divisors (see below), whose sum is σ = 118079424. Its totient is φ = 65599600.

The previous prime is 90199493. The next prime is 90199507. The reversal of 90199505 is 50599109.

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

It is not a de Polignac number, because 90199505 - 2⁴ = 90199489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90199507) 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, 819941 + ... + 820050.

It is an arithmetic number, because the mean of its divisors is an integer number (14759928).

Almost surely, 2^90199505 is an apocalyptic number.

It is an amenable number.

90199505 is a deficient number, since it is larger than the sum of its proper divisors (27879919).

90199505 is a wasteful number, since it uses less digits than its factorization.

90199505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640007.

The product of its (nonzero) digits is 18225, while the sum is 38.

The square root of 90199505 is about 9497.3419965799. The cubic root of 90199505 is about 448.4713645953.

The spelling of 90199505 in words is "ninety million, one hundred ninety-nine thousand, five hundred five".