201889497 has 8 divisors (see below), whose sum is σ = 283353760. Its totient is φ = 127509120.

The previous prime is 201889481. The next prime is 201889517. The reversal of 201889497 is 794988102.

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

It is not a de Polignac number, because 201889497 - 2⁴ = 201889481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201889397) 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, 1770904 + ... + 1771017.

It is an arithmetic number, because the mean of its divisors is an integer number (35419220).

Almost surely, 2^201889497 is an apocalyptic number.

It is an amenable number.

201889497 is a deficient number, since it is larger than the sum of its proper divisors (81464263).

201889497 is a wasteful number, since it uses less digits than its factorization.

201889497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541943.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 201889497 is about 14208.7823897757. The cubic root of 201889497 is about 586.6394191819.

The spelling of 201889497 in words is "two hundred one million, eight hundred eighty-nine thousand, four hundred ninety-seven".