90690841 has 4 divisors (see below), whose sum is σ = 93616384. Its totient is φ = 87765300.

The previous prime is 90690833. The next prime is 90690877. The reversal of 90690841 is 14809609.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14809609 = 2917 ⋅5077.

It is a cyclic number.

It is not a de Polignac number, because 90690841 - 2³ = 90690833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90690841.

It is not an unprimeable number, because it can be changed into a prime (90690241) 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, 1462725 + ... + 1462786.

It is an arithmetic number, because the mean of its divisors is an integer number (23404096).

Almost surely, 2^90690841 is an apocalyptic number.

It is an amenable number.

90690841 is a deficient number, since it is larger than the sum of its proper divisors (2925543).

90690841 is a wasteful number, since it uses less digits than its factorization.

90690841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925542.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 90690841 is about 9523.1738931934. The cubic root of 90690841 is about 449.2841969743.

The spelling of 90690841 in words is "ninety million, six hundred ninety thousand, eight hundred forty-one".