1691077613 has 2 divisors, whose sum is σ = 1691077614. Its totient is φ = 1691077612.

The previous prime is 1691077511. The next prime is 1691077627. The reversal of 1691077613 is 3167701961.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1355565124 + 335512489 = 36818^2 + 18317^2 .

It is a cyclic number.

It is not a de Polignac number, because 1691077613 - 2⁸ = 1691077357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1691070613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845538806 + 845538807.

It is an arithmetic number, because the mean of its divisors is an integer number (845538807).

Almost surely, 2^1691077613 is an apocalyptic number.

It is an amenable number.

1691077613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691077613 is an equidigital number, since it uses as much as digits as its factorization.

1691077613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 1691077613 is about 41122.7140762864. The cubic root of 1691077613 is about 1191.3915442351.

The spelling of 1691077613 in words is "one billion, six hundred ninety-one million, seventy-seven thousand, six hundred thirteen".