201786945 has 16 divisors (see below), whose sum is σ = 324647232. Its totient is φ = 107023680.

The previous prime is 201786931. The next prime is 201787037. The reversal of 201786945 is 549687102.

It is not a de Polignac number, because 201786945 - 2⁴ = 201786929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201786897 and 201786906.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34447 + ... + 39876.

It is an arithmetic number, because the mean of its divisors is an integer number (20290452).

Almost surely, 2^201786945 is an apocalyptic number.

It is an amenable number.

201786945 is a deficient number, since it is larger than the sum of its proper divisors (122860287).

201786945 is a wasteful number, since it uses less digits than its factorization.

201786945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74512.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 201786945 is about 14205.1731774027. The cubic root of 201786945 is about 586.5400723676.

The spelling of 201786945 in words is "two hundred one million, seven hundred eighty-six thousand, nine hundred forty-five".