1620130249 has 2 divisors, whose sum is σ = 1620130250. Its totient is φ = 1620130248.

The previous prime is 1620130231. The next prime is 1620130261. The reversal of 1620130249 is 9420310261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1213825600 + 406304649 = 34840^2 + 20157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1620130249 - 2¹³ = 1620122057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1620130229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810065124 + 810065125.

It is an arithmetic number, because the mean of its divisors is an integer number (810065125).

Almost surely, 2^1620130249 is an apocalyptic number.

It is an amenable number.

1620130249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620130249 is an equidigital number, since it uses as much as digits as its factorization.

1620130249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1620130249 is about 40250.8415936860. The cubic root of 1620130249 is about 1174.4917672846.

The spelling of 1620130249 in words is "one billion, six hundred twenty million, one hundred thirty thousand, two hundred forty-nine".