91203954335969 has 2 divisors, whose sum is σ = 91203954335970. Its totient is φ = 91203954335968.

The previous prime is 91203954335927. The next prime is 91203954335987. The reversal of 91203954335969 is 96953345930219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55280533567744 + 35923420768225 = 7435088^2 + 5993615^2 .

It is a cyclic number.

It is not a de Polignac number, because 91203954335969 - 2³⁶ = 91135234859233 is a prime.

It is a super-2 number, since 2×91203954335969² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91203954335899 and 91203954335908.

It is not a weakly prime, because it can be changed into another prime (91203954335909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45601977167984 + 45601977167985.

It is an arithmetic number, because the mean of its divisors is an integer number (45601977167985).

Almost surely, 2^{91203954335969} is an apocalyptic number.

It is an amenable number.

91203954335969 is a deficient number, since it is larger than the sum of its proper divisors (1).

91203954335969 is an equidigital number, since it uses as much as digits as its factorization.

91203954335969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 212576400, while the sum is 68.

The spelling of 91203954335969 in words is "ninety-one trillion, two hundred three billion, nine hundred fifty-four million, three hundred thirty-five thousand, nine hundred sixty-nine".