77265491 has 2 divisors, whose sum is σ = 77265492. Its totient is φ = 77265490.

The previous prime is 77265473. The next prime is 77265497. The reversal of 77265491 is 19456277.

It is a strong prime.

It is an emirp because it is prime and its reverse (19456277) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77265491 is a prime.

It is not a weakly prime, because it can be changed into another prime (77265497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38632745 + 38632746.

It is an arithmetic number, because the mean of its divisors is an integer number (38632746).

Almost surely, 2^77265491 is an apocalyptic number.

77265491 is a deficient number, since it is larger than the sum of its proper divisors (1).

77265491 is an equidigital number, since it uses as much as digits as its factorization.

77265491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 77265491 is about 8790.0791236484. The cubic root of 77265491 is about 425.9204796945.

The spelling of 77265491 in words is "seventy-seven million, two hundred sixty-five thousand, four hundred ninety-one".