1906520345 has 8 divisors (see below), whose sum is σ = 2288389320. Its totient is φ = 1524839680.

The previous prime is 1906520327. The next prime is 1906520381. The reversal of 1906520345 is 5430256091.

It can be written as a sum of positive squares in 4 ways, for example, as 350138944 + 1556381401 = 18712^2 + 39451^2 .

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

It is not a de Polignac number, because 1906520345 - 2⁶ = 1906520281 is a prime.

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, 23750 + ... + 66159.

It is an arithmetic number, because the mean of its divisors is an integer number (286048665).

Almost surely, 2^1906520345 is an apocalyptic number.

It is an amenable number.

1906520345 is a deficient number, since it is larger than the sum of its proper divisors (381868975).

1906520345 is an equidigital number, since it uses as much as digits as its factorization.

1906520345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94155.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1906520345 is about 43663.7188636057. The cubic root of 1906520345 is about 1239.9775284256.

The spelling of 1906520345 in words is "one billion, nine hundred six million, five hundred twenty thousand, three hundred forty-five".