90619906 has 8 divisors (see below), whose sum is σ = 146386044. Its totient is φ = 41824560.

The previous prime is 90619891. The next prime is 90619909. The reversal of 90619906 is 60991609.

It can be written as a sum of positive squares in 2 ways, for example, as 90535225 + 84681 = 9515^2 + 291^2 .

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

It is not an unprimeable number, because it can be changed into a prime (90619909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742665 + ... + 1742716.

Almost surely, 2^90619906 is an apocalyptic number.

90619906 is a deficient number, since it is larger than the sum of its proper divisors (55766138).

90619906 is a wasteful number, since it uses less digits than its factorization.

90619906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3485396.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 90619906 is about 9519.4488285825. The cubic root of 90619906 is about 449.1670286291.

The spelling of 90619906 in words is "ninety million, six hundred nineteen thousand, nine hundred six".