91472007923677 has 2 divisors, whose sum is σ = 91472007923678. Its totient is φ = 91472007923676.

The previous prime is 91472007923581. The next prime is 91472007923717. The reversal of 91472007923677 is 77632970027419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77379837289561 + 14092170634116 = 8796581^2 + 3753954^2 .

It is a cyclic number.

It is not a de Polignac number, because 91472007923677 - 2¹¹ = 91472007921629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91472007923977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45736003961838 + 45736003961839.

It is an arithmetic number, because the mean of its divisors is an integer number (45736003961839).

Almost surely, 2^{91472007923677} is an apocalyptic number.

It is an amenable number.

91472007923677 is a deficient number, since it is larger than the sum of its proper divisors (1).

91472007923677 is an equidigital number, since it uses as much as digits as its factorization.

91472007923677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56010528, while the sum is 64.

The spelling of 91472007923677 in words is "ninety-one trillion, four hundred seventy-two billion, seven million, nine hundred twenty-three thousand, six hundred seventy-seven".