201667990 has 16 divisors (see below), whose sum is σ = 368421552. Its totient is φ = 79462944.

The previous prime is 201667987. The next prime is 201667997. The reversal of 201667990 is 99766102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201667997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149829 + ... + 151168.

It is an arithmetic number, because the mean of its divisors is an integer number (23026347).

Almost surely, 2^201667990 is an apocalyptic number.

201667990 is a deficient number, since it is larger than the sum of its proper divisors (166753562).

201667990 is a wasteful number, since it uses less digits than its factorization.

201667990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301071.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 201667990 is about 14200.9855291807. The cubic root of 201667990 is about 586.4247930414.

The spelling of 201667990 in words is "two hundred one million, six hundred sixty-seven thousand, nine hundred ninety".