1613089817 has 2 divisors, whose sum is σ = 1613089818. Its totient is φ = 1613089816.

The previous prime is 1613089787. The next prime is 1613089837. The reversal of 1613089817 is 7189803161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1439140096 + 173949721 = 37936^2 + 13189^2 .

It is an emirp because it is prime and its reverse (7189803161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1613089817 - 2¹⁴ = 1613073433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1613089837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806544908 + 806544909.

It is an arithmetic number, because the mean of its divisors is an integer number (806544909).

Almost surely, 2^1613089817 is an apocalyptic number.

It is an amenable number.

1613089817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613089817 is an equidigital number, since it uses as much as digits as its factorization.

1613089817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1613089817 is about 40163.2894195682. The cubic root of 1613089817 is about 1172.7880079237.

The spelling of 1613089817 in words is "one billion, six hundred thirteen million, eighty-nine thousand, eight hundred seventeen".