1101720057 has 4 divisors (see below), whose sum is σ = 1468960080. Its totient is φ = 734480036.

The previous prime is 1101720049. The next prime is 1101720089. The reversal of 1101720057 is 7500271011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1101720057 - 2³ = 1101720049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1101720457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183620007 + ... + 183620012.

It is an arithmetic number, because the mean of its divisors is an integer number (367240020).

Almost surely, 2^1101720057 is an apocalyptic number.

It is an amenable number.

1101720057 is a deficient number, since it is larger than the sum of its proper divisors (367240023).

1101720057 is an equidigital number, since it uses as much as digits as its factorization.

1101720057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367240022.

The product of its (nonzero) digits is 490, while the sum is 24.

The square root of 1101720057 is about 33192.1686094777. The cubic root of 1101720057 is about 1032.8178899888.

Adding to 1101720057 its reverse (7500271011), we get a palindrome (8601991068).

The spelling of 1101720057 in words is "one billion, one hundred one million, seven hundred twenty thousand, fifty-seven".