201675978 has 24 divisors (see below), whose sum is σ = 499388448. Its totient is φ = 57621672.

The previous prime is 201675967. The next prime is 201675979. The reversal of 201675978 is 879576102.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201675979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 800176 + ... + 800427.

It is an arithmetic number, because the mean of its divisors is an integer number (20807852).

Almost surely, 2^201675978 is an apocalyptic number.

201675978 is an abundant number, since it is smaller than the sum of its proper divisors (297712470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201675978 is a wasteful number, since it uses less digits than its factorization.

201675978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600618 (or 1600615 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 201675978 is about 14201.2667744818. The cubic root of 201675978 is about 586.4325356343.

The spelling of 201675978 in words is "two hundred one million, six hundred seventy-five thousand, nine hundred seventy-eight".