77400523 has 2 divisors, whose sum is σ = 77400524. Its totient is φ = 77400522.

The previous prime is 77400481. The next prime is 77400551. The reversal of 77400523 is 32500477.

It is an a-pointer prime, because the next prime (77400551) can be obtained adding 77400523 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77400523 - 2¹³ = 77392331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77400491 and 77400500.

It is not a weakly prime, because it can be changed into another prime (77400553) 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, 38700261 + 38700262.

It is an arithmetic number, because the mean of its divisors is an integer number (38700262).

Almost surely, 2^77400523 is an apocalyptic number.

77400523 is a deficient number, since it is larger than the sum of its proper divisors (1).

77400523 is an equidigital number, since it uses as much as digits as its factorization.

77400523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 77400523 is about 8797.7567027055. The cubic root of 77400523 is about 426.1684533676.

The spelling of 77400523 in words is "seventy-seven million, four hundred thousand, five hundred twenty-three".