1613955389 has 2 divisors, whose sum is σ = 1613955390. Its totient is φ = 1613955388.

The previous prime is 1613955373. The next prime is 1613955397. The reversal of 1613955389 is 9835593161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1336999225 + 276956164 = 36565^2 + 16642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613955389 - 2⁴ = 1613955373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1613955319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806977694 + 806977695.

It is an arithmetic number, because the mean of its divisors is an integer number (806977695).

Almost surely, 2^1613955389 is an apocalyptic number.

It is an amenable number.

1613955389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613955389 is an equidigital number, since it uses as much as digits as its factorization.

1613955389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 50.

The square root of 1613955389 is about 40174.0636356344. The cubic root of 1613955389 is about 1172.9977401891.

The spelling of 1613955389 in words is "one billion, six hundred thirteen million, nine hundred fifty-five thousand, three hundred eighty-nine".