91429752977 has 2 divisors, whose sum is σ = 91429752978. Its totient is φ = 91429752976.

The previous prime is 91429752961. The next prime is 91429753031. The reversal of 91429752977 is 77925792419.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83289382801 + 8140370176 = 288599^2 + 90224^2 .

It is a cyclic number.

It is not a de Polignac number, because 91429752977 - 2⁴ = 91429752961 is a prime.

It is not a weakly prime, because it can be changed into another prime (91429752907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45714876488 + 45714876489.

It is an arithmetic number, because the mean of its divisors is an integer number (45714876489).

Almost surely, 2^91429752977 is an apocalyptic number.

It is an amenable number.

91429752977 is a deficient number, since it is larger than the sum of its proper divisors (1).

91429752977 is an equidigital number, since it uses as much as digits as its factorization.

91429752977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20003760, while the sum is 62.

The spelling of 91429752977 in words is "ninety-one billion, four hundred twenty-nine million, seven hundred fifty-two thousand, nine hundred seventy-seven".