130621109 has 2 divisors, whose sum is σ = 130621110. Its totient is φ = 130621108.

The previous prime is 130621087. The next prime is 130621129. The reversal of 130621109 is 901126031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122036209 + 8584900 = 11047^2 + 2930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130621109 is a prime.

It is a Chen prime.

It is equal to p_7411325 and since 130621109 and 7411325 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130621129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65310554 + 65310555.

It is an arithmetic number, because the mean of its divisors is an integer number (65310555).

Almost surely, 2^130621109 is an apocalyptic number.

It is an amenable number.

130621109 is a deficient number, since it is larger than the sum of its proper divisors (1).

130621109 is an equidigital number, since it uses as much as digits as its factorization.

130621109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 130621109 is about 11428.9592264563. The cubic root of 130621109 is about 507.3851927930.

The spelling of 130621109 in words is "one hundred thirty million, six hundred twenty-one thousand, one hundred nine".