90780409 has 8 divisors (see below), whose sum is σ = 92736000. Its totient is φ = 88838832.

The previous prime is 90780407. The next prime is 90780419. The reversal of 90780409 is 90408709.

It is a happy number.

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 90780409 - 2¹ = 90780407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90780407) 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, 10152 + ... + 16870.

It is an arithmetic number, because the mean of its divisors is an integer number (11592000).

Almost surely, 2^90780409 is an apocalyptic number.

It is an amenable number.

90780409 is a deficient number, since it is larger than the sum of its proper divisors (1955591).

90780409 is a wasteful number, since it uses less digits than its factorization.

90780409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 90780409 is about 9527.8753665232. The cubic root of 90780409 is about 449.4320555159.

The spelling of 90780409 in words is "ninety million, seven hundred eighty thousand, four hundred nine".