77061191 has 2 divisors, whose sum is σ = 77061192. Its totient is φ = 77061190.

The previous prime is 77061163. The next prime is 77061241. The reversal of 77061191 is 19116077.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77061191 - 2²² = 72866887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77061791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38530595 + 38530596.

It is an arithmetic number, because the mean of its divisors is an integer number (38530596).

Almost surely, 2^77061191 is an apocalyptic number.

77061191 is a deficient number, since it is larger than the sum of its proper divisors (1).

77061191 is an equidigital number, since it uses as much as digits as its factorization.

77061191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 32.

The square root of 77061191 is about 8778.4503757782. The cubic root of 77061191 is about 425.5447519743.

The spelling of 77061191 in words is "seventy-seven million, sixty-one thousand, one hundred ninety-one".