201999497 has 16 divisors (see below), whose sum is σ = 238046592. Its totient is φ = 167806080.

The previous prime is 201999463. The next prime is 201999557. The reversal of 201999497 is 794999102.

It is a cyclic number.

It is not a de Polignac number, because 201999497 - 2⁶ = 201999433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201999437) 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, 42818 + ... + 47300.

It is an arithmetic number, because the mean of its divisors is an integer number (14877912).

Almost surely, 2^201999497 is an apocalyptic number.

It is an amenable number.

201999497 is a deficient number, since it is larger than the sum of its proper divisors (36047095).

201999497 is a wasteful number, since it uses less digits than its factorization.

201999497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4688.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 201999497 is about 14212.6527080626. The cubic root of 201999497 is about 586.7459438250.

The spelling of 201999497 in words is "two hundred one million, nine hundred ninety-nine thousand, four hundred ninety-seven".