90780949 has 8 divisors (see below), whose sum is σ = 104277888. Its totient is φ = 77416080.

The previous prime is 90780947. The next prime is 90780953. The reversal of 90780949 is 94908709.

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

It is not a de Polignac number, because 90780949 - 2¹ = 90780947 is a prime.

It is a super-4 number, since 4×90780949⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90780899 and 90780908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90780947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31537 + ... + 34294.

It is an arithmetic number, because the mean of its divisors is an integer number (13034736).

Almost surely, 2^90780949 is an apocalyptic number.

It is an amenable number.

90780949 is a deficient number, since it is larger than the sum of its proper divisors (13496939).

90780949 is a wasteful number, since it uses less digits than its factorization.

90780949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66035.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 90780949 is about 9527.9037043832. The cubic root of 90780949 is about 449.4329466510.

The spelling of 90780949 in words is "ninety million, seven hundred eighty thousand, nine hundred forty-nine".