90243061 has 2 divisors, whose sum is σ = 90243062. Its totient is φ = 90243060.

The previous prime is 90243031. The next prime is 90243073. The reversal of 90243061 is 16034209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87778161 + 2464900 = 9369^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 90243061 - 2⁹ = 90242549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90243001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45121530 + 45121531.

It is an arithmetic number, because the mean of its divisors is an integer number (45121531).

Almost surely, 2^90243061 is an apocalyptic number.

It is an amenable number.

90243061 is a deficient number, since it is larger than the sum of its proper divisors (1).

90243061 is an equidigital number, since it uses as much as digits as its factorization.

90243061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 90243061 is about 9499.6347824535. The cubic root of 90243061 is about 448.5435396973.

The spelling of 90243061 in words is "ninety million, two hundred forty-three thousand, sixty-one".