77149123 has 2 divisors, whose sum is σ = 77149124. Its totient is φ = 77149122.

The previous prime is 77149103. The next prime is 77149133. The reversal of 77149123 is 32194177.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77149123 - 2⁵ = 77149091 is a prime.

It is not a weakly prime, because it can be changed into another prime (77149103) 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, 38574561 + 38574562.

It is an arithmetic number, because the mean of its divisors is an integer number (38574562).

Almost surely, 2^77149123 is an apocalyptic number.

77149123 is a deficient number, since it is larger than the sum of its proper divisors (1).

77149123 is an equidigital number, since it uses as much as digits as its factorization.

77149123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 34.

The square root of 77149123 is about 8783.4573489031. The cubic root of 77149123 is about 425.7065488405.

It can be divided in two parts, 771 and 49123, that added together give a palindrome (49894).

The spelling of 77149123 in words is "seventy-seven million, one hundred forty-nine thousand, one hundred twenty-three".