1613200409 has 2 divisors, whose sum is σ = 1613200410. Its totient is φ = 1613200408.

The previous prime is 1613200387. The next prime is 1613200439. The reversal of 1613200409 is 9040023161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 862714384 + 750486025 = 29372^2 + 27395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613200409 - 2⁸ = 1613200153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1613200439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806600204 + 806600205.

It is an arithmetic number, because the mean of its divisors is an integer number (806600205).

Almost surely, 2^1613200409 is an apocalyptic number.

It is an amenable number.

1613200409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613200409 is an equidigital number, since it uses as much as digits as its factorization.

1613200409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1613200409 is about 40164.6661756325. Note that the first 3 decimals coincide. The cubic root of 1613200409 is about 1172.8148090781.

The spelling of 1613200409 in words is "one billion, six hundred thirteen million, two hundred thousand, four hundred nine".