613779091 has 2 divisors, whose sum is σ = 613779092. Its totient is φ = 613779090.

The previous prime is 613779079. The next prime is 613779149. The reversal of 613779091 is 190977316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 613779091 - 2¹⁵ = 613746323 is a prime.

It is not a weakly prime, because it can be changed into another prime (613779031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306889545 + 306889546.

It is an arithmetic number, because the mean of its divisors is an integer number (306889546).

Almost surely, 2^613779091 is an apocalyptic number.

613779091 is a deficient number, since it is larger than the sum of its proper divisors (1).

613779091 is an equidigital number, since it uses as much as digits as its factorization.

613779091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 613779091 is about 24774.5654048663. The cubic root of 613779091 is about 849.8403811002.

The spelling of 613779091 in words is "six hundred thirteen million, seven hundred seventy-nine thousand, ninety-one".