90665241739 has 2 divisors, whose sum is σ = 90665241740. Its totient is φ = 90665241738.

The previous prime is 90665241703. The next prime is 90665241787. The reversal of 90665241739 is 93714256609.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90665241739 is a prime.

It is not a weakly prime, because it can be changed into another prime (90665241239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45332620869 + 45332620870.

It is an arithmetic number, because the mean of its divisors is an integer number (45332620870).

Almost surely, 2^90665241739 is an apocalyptic number.

90665241739 is a deficient number, since it is larger than the sum of its proper divisors (1).

90665241739 is an equidigital number, since it uses as much as digits as its factorization.

90665241739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 90665241739 in words is "ninety billion, six hundred sixty-five million, two hundred forty-one thousand, seven hundred thirty-nine".