1986945353 has 16 divisors (see below), whose sum is σ = 2098176000. Its totient is φ = 1878956352.

The previous prime is 1986945319. The next prime is 1986945377. The reversal of 1986945353 is 3535496891.

It is a cyclic number.

It is not a de Polignac number, because 1986945353 - 2²⁶ = 1919836489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1986945295 and 1986945304.

It is not an unprimeable number, because it can be changed into a prime (1986945053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287543 + ... + 294371.

It is an arithmetic number, because the mean of its divisors is an integer number (131136000).

Almost surely, 2^1986945353 is an apocalyptic number.

It is an amenable number.

1986945353 is a deficient number, since it is larger than the sum of its proper divisors (111230647).

1986945353 is a wasteful number, since it uses less digits than its factorization.

1986945353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064.

The product of its digits is 3499200, while the sum is 53.

The square root of 1986945353 is about 44575.1652044050. The cubic root of 1986945353 is about 1257.1737596195.

The spelling of 1986945353 in words is "one billion, nine hundred eighty-six million, nine hundred forty-five thousand, three hundred fifty-three".