91738340741 has 2 divisors, whose sum is σ = 91738340742. Its totient is φ = 91738340740.

The previous prime is 91738340731. The next prime is 91738340761. The reversal of 91738340741 is 14704383719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88137140641 + 3601200100 = 296879^2 + 60010^2 .

It is a cyclic number.

It is not a de Polignac number, because 91738340741 - 2²⁶ = 91671231877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91738340731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45869170370 + 45869170371.

It is an arithmetic number, because the mean of its divisors is an integer number (45869170371).

Almost surely, 2^91738340741 is an apocalyptic number.

It is an amenable number.

91738340741 is a deficient number, since it is larger than the sum of its proper divisors (1).

91738340741 is an equidigital number, since it uses as much as digits as its factorization.

91738340741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 91738340741 in words is "ninety-one billion, seven hundred thirty-eight million, three hundred forty thousand, seven hundred forty-one".