77531032429 has 2 divisors, whose sum is σ = 77531032430. Its totient is φ = 77531032428.

The previous prime is 77531032399. The next prime is 77531032459. The reversal of 77531032429 is 92423013577.

It is a balanced prime because it is at equal distance from previous prime (77531032399) and next prime (77531032459).

It can be written as a sum of positive squares in only one way, i.e., 42308376100 + 35222656329 = 205690^2 + 187677^2 .

It is an emirp because it is prime and its reverse (92423013577) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77531032429 - 2⁷ = 77531032301 is a prime.

It is a super-2 number, since 2×77531032429² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77531032459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38765516214 + 38765516215.

It is an arithmetic number, because the mean of its divisors is an integer number (38765516215).

Almost surely, 2^77531032429 is an apocalyptic number.

It is an amenable number.

77531032429 is a deficient number, since it is larger than the sum of its proper divisors (1).

77531032429 is an equidigital number, since it uses as much as digits as its factorization.

77531032429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 77531032429 in words is "seventy-seven billion, five hundred thirty-one million, thirty-two thousand, four hundred twenty-nine".