201097764 has 54 divisors (see below), whose sum is σ = 591328374. Its totient is φ = 57456000.

The previous prime is 201097751. The next prime is 201097789. The reversal of 201097764 is 467790102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 185177664 + 15920100 = 13608^2 + 3990^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 55237 + ... + 58764.

Almost surely, 2^201097764 is an apocalyptic number.

It is an amenable number.

201097764 is an abundant number, since it is smaller than the sum of its proper divisors (390230610).

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

201097764 is a wasteful number, since it uses less digits than its factorization.

201097764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114025 (or 114013 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 201097764 is about 14180.8943300484. The cubic root of 201097764 is about 585.8715564529.

The spelling of 201097764 in words is "two hundred one million, ninety-seven thousand, seven hundred sixty-four".