1613897849 has 2 divisors, whose sum is σ = 1613897850. Its totient is φ = 1613897848.

The previous prime is 1613897837. The next prime is 1613897863. The reversal of 1613897849 is 9487983161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1446661225 + 167236624 = 38035^2 + 12932^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613897849 - 2¹² = 1613893753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1613897794 and 1613897803.

It is not a weakly prime, because it can be changed into another prime (1613897869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806948924 + 806948925.

It is an arithmetic number, because the mean of its divisors is an integer number (806948925).

Almost surely, 2^1613897849 is an apocalyptic number.

It is an amenable number.

1613897849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613897849 is an equidigital number, since it uses as much as digits as its factorization.

1613897849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 56.

The square root of 1613897849 is about 40173.3474955722. The cubic root of 1613897849 is about 1172.9838002970.

The spelling of 1613897849 in words is "one billion, six hundred thirteen million, eight hundred ninety-seven thousand, eight hundred forty-nine".