130990945 has 8 divisors (see below), whose sum is σ = 157378536. Its totient is φ = 104666496.

The previous prime is 130990919. The next prime is 130990991. The reversal of 130990945 is 549099031.

It can be written as a sum of positive squares in 4 ways, for example, as 10188864 + 120802081 = 3192^2 + 10991^2 .

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 130990945 - 2⁵ = 130990913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130990898 and 130990907.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11092 + ... + 19621.

It is an arithmetic number, because the mean of its divisors is an integer number (19672317).

Almost surely, 2^130990945 is an apocalyptic number.

It is an amenable number.

130990945 is a deficient number, since it is larger than the sum of its proper divisors (26387591).

130990945 is an equidigital number, since it uses as much as digits as its factorization.

130990945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31571.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 130990945 is about 11445.1275659121. The cubic root of 130990945 is about 507.8636057347.

The spelling of 130990945 in words is "one hundred thirty million, nine hundred ninety thousand, nine hundred forty-five".