102621313 has 4 divisors (see below), whose sum is σ = 105394900. Its totient is φ = 99847728.

The previous prime is 102621307. The next prime is 102621329. The reversal of 102621313 is 313126201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313126201 = 10463 ⋅29927.

It can be written as a sum of positive squares in 2 ways, for example, as 70946929 + 31674384 = 8423^2 + 5628^2 .

It is a cyclic number.

It is not a de Polignac number, because 102621313 - 2⁹ = 102620801 is a prime.

It is a super-2 number, since 2×102621313² = 21062267763687938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102621383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386738 + ... + 1386811.

It is an arithmetic number, because the mean of its divisors is an integer number (26348725).

Almost surely, 2^102621313 is an apocalyptic number.

It is an amenable number.

102621313 is a deficient number, since it is larger than the sum of its proper divisors (2773587).

102621313 is an equidigital number, since it uses as much as digits as its factorization.

102621313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773586.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 102621313 is about 10130.2178160196. The cubic root of 102621313 is about 468.1796388934.

Adding to 102621313 its reverse (313126201), we get a palindrome (415747514).

The spelling of 102621313 in words is "one hundred two million, six hundred twenty-one thousand, three hundred thirteen".