201749731 has 8 divisors (see below), whose sum is σ = 203076720. Its totient is φ = 200427552.

The previous prime is 201749729. The next prime is 201749773. The reversal of 201749731 is 137947102.

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

It is a cyclic number.

It is not a de Polignac number, because 201749731 - 2¹ = 201749729 is a prime.

It is a super-2 number, since 2×201749731² = 81405907917144722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201749701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118321 + ... + 120013.

It is an arithmetic number, because the mean of its divisors is an integer number (25384590).

Almost surely, 2^201749731 is an apocalyptic number.

201749731 is a deficient number, since it is larger than the sum of its proper divisors (1326989).

201749731 is a wasteful number, since it uses less digits than its factorization.

201749731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 201749731 is about 14203.8632420902. The cubic root of 201749731 is about 586.5040131399.

The spelling of 201749731 in words is "two hundred one million, seven hundred forty-nine thousand, seven hundred thirty-one".