102830621 has 4 divisors (see below), whose sum is σ = 103040544. Its totient is φ = 102620700.

The previous prime is 102830617. The next prime is 102830657. The reversal of 102830621 is 126038201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126038201 = 1901 ⋅66301.

It is a cyclic number.

It is not a de Polignac number, because 102830621 - 2² = 102830617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102839621) 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, 104225 + ... + 105206.

It is an arithmetic number, because the mean of its divisors is an integer number (25760136).

Almost surely, 2^102830621 is an apocalyptic number.

It is an amenable number.

102830621 is a deficient number, since it is larger than the sum of its proper divisors (209923).

102830621 is an equidigital number, since it uses as much as digits as its factorization.

102830621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209922.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 102830621 is about 10140.5434272528. The cubic root of 102830621 is about 468.4977248517.

Adding to 102830621 its reverse (126038201), we get a palindrome (228868822).

The spelling of 102830621 in words is "one hundred two million, eight hundred thirty thousand, six hundred twenty-one".