1613430121 has 2 divisors, whose sum is σ = 1613430122. Its totient is φ = 1613430120.

The previous prime is 1613430113. The next prime is 1613430157. The reversal of 1613430121 is 1210343161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1513210000 + 100220121 = 38900^2 + 10011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613430121 - 2³ = 1613430113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1613430092 and 1613430101.

It is not a weakly prime, because it can be changed into another prime (1613433121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806715060 + 806715061.

It is an arithmetic number, because the mean of its divisors is an integer number (806715061).

Almost surely, 2^1613430121 is an apocalyptic number.

It is an amenable number.

1613430121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613430121 is an equidigital number, since it uses as much as digits as its factorization.

1613430121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1613430121 is about 40167.5257017407. The cubic root of 1613430121 is about 1172.8704741703.

Adding to 1613430121 its reverse (1210343161), we get a palindrome (2823773282).

The spelling of 1613430121 in words is "one billion, six hundred thirteen million, four hundred thirty thousand, one hundred twenty-one".