77423477 has 2 divisors, whose sum is σ = 77423478. Its totient is φ = 77423476.

The previous prime is 77423453. The next prime is 77423483. The reversal of 77423477 is 77432477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52911076 + 24512401 = 7274^2 + 4951^2 .

It is a cyclic number.

It is not a de Polignac number, because 77423477 - 2¹⁶ = 77357941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77423077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38711738 + 38711739.

It is an arithmetic number, because the mean of its divisors is an integer number (38711739).

Almost surely, 2^77423477 is an apocalyptic number.

It is an amenable number.

77423477 is a deficient number, since it is larger than the sum of its proper divisors (1).

77423477 is an equidigital number, since it uses as much as digits as its factorization.

77423477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230496, while the sum is 41.

The square root of 77423477 is about 8799.0611430993. The cubic root of 77423477 is about 426.2105775611.

The spelling of 77423477 in words is "seventy-seven million, four hundred twenty-three thousand, four hundred seventy-seven".