90540613 has 2 divisors, whose sum is σ = 90540614. Its totient is φ = 90540612.

The previous prime is 90540607. The next prime is 90540629. The reversal of 90540613 is 31604509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88792929 + 1747684 = 9423^2 + 1322^2 .

It is an emirp because it is prime and its reverse (31604509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90540613 - 2¹⁷ = 90409541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90540683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45270306 + 45270307.

It is an arithmetic number, because the mean of its divisors is an integer number (45270307).

Almost surely, 2^90540613 is an apocalyptic number.

It is an amenable number.

90540613 is a deficient number, since it is larger than the sum of its proper divisors (1).

90540613 is an equidigital number, since it uses as much as digits as its factorization.

90540613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 90540613 is about 9515.2831276846. The cubic root of 90540613 is about 449.0359823876.

The spelling of 90540613 in words is "ninety million, five hundred forty thousand, six hundred thirteen".