90729339641 has 2 divisors, whose sum is σ = 90729339642. Its totient is φ = 90729339640.

The previous prime is 90729339611. The next prime is 90729339647. The reversal of 90729339641 is 14693392709.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82773591616 + 7955748025 = 287704^2 + 89195^2 .

It is an emirp because it is prime and its reverse (14693392709) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90729339641 - 2⁶ = 90729339577 is a prime.

It is not a weakly prime, because it can be changed into another prime (90729339647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45364669820 + 45364669821.

It is an arithmetic number, because the mean of its divisors is an integer number (45364669821).

Almost surely, 2^90729339641 is an apocalyptic number.

It is an amenable number.

90729339641 is a deficient number, since it is larger than the sum of its proper divisors (1).

90729339641 is an equidigital number, since it uses as much as digits as its factorization.

90729339641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The spelling of 90729339641 in words is "ninety billion, seven hundred twenty-nine million, three hundred thirty-nine thousand, six hundred forty-one".