77049191 has 2 divisors, whose sum is σ = 77049192. Its totient is φ = 77049190.

The previous prime is 77049179. The next prime is 77049197. The reversal of 77049191 is 19194077.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77049191 - 2¹⁸ = 76787047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77049197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38524595 + 38524596.

It is an arithmetic number, because the mean of its divisors is an integer number (38524596).

Almost surely, 2^77049191 is an apocalyptic number.

77049191 is a deficient number, since it is larger than the sum of its proper divisors (1).

77049191 is an equidigital number, since it uses as much as digits as its factorization.

77049191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 77049191 is about 8777.7668572365. The cubic root of 77049191 is about 425.5226621604.

The spelling of 77049191 in words is "seventy-seven million, forty-nine thousand, one hundred ninety-one".