102720353 has 4 divisors (see below), whose sum is σ = 102740628. Its totient is φ = 102700080.

The previous prime is 102720337. The next prime is 102720367. The reversal of 102720353 is 353027201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25684624 + 77035729 = 5068^2 + 8777^2 .

It is a cyclic number.

It is not a de Polignac number, because 102720353 - 2⁴ = 102720337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102720383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4775 + ... + 15107.

It is an arithmetic number, because the mean of its divisors is an integer number (25685157).

Almost surely, 2^102720353 is an apocalyptic number.

It is an amenable number.

102720353 is a deficient number, since it is larger than the sum of its proper divisors (20275).

102720353 is an equidigital number, since it uses as much as digits as its factorization.

102720353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20274.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 102720353 is about 10135.1049821894. The cubic root of 102720353 is about 468.3302041164.

Adding to 102720353 its reverse (353027201), we get a palindrome (455747554).

The spelling of 102720353 in words is "one hundred two million, seven hundred twenty thousand, three hundred fifty-three".