133748565 has 16 divisors (see below), whose sum is σ = 223302528. Its totient is φ = 68230976.

The previous prime is 133748561. The next prime is 133748567. The reversal of 133748565 is 565847331.

It is a cyclic number.

It is not a de Polignac number, because 133748565 - 2² = 133748561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133748561) 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, 193494 + ... + 194183.

It is an arithmetic number, because the mean of its divisors is an integer number (13956408).

Almost surely, 2^133748565 is an apocalyptic number.

133748565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133748565 is a deficient number, since it is larger than the sum of its proper divisors (89553963).

133748565 is a wasteful number, since it uses less digits than its factorization.

133748565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387708.

The product of its digits is 302400, while the sum is 42.

The square root of 133748565 is about 11564.9714655939. The cubic root of 133748565 is about 511.4027319299.

The spelling of 133748565 in words is "one hundred thirty-three million, seven hundred forty-eight thousand, five hundred sixty-five".